diff --git a/frontend/src/lib/prefetchers.ts b/frontend/src/lib/prefetchers.ts
index 956f250..a0380e0 100644
--- a/frontend/src/lib/prefetchers.ts
+++ b/frontend/src/lib/prefetchers.ts
@@ -68,13 +68,32 @@ const prefetchWikiPageShow: Prefetcher = async (qc, url) => {
 
 const prefetchPostsIndex: Prefetcher = async (qc, url) => {
   const tags = url.searchParams.get ('tags') ?? ''
-  const m = url.searchParams.get ('match') === 'any' ? 'any' : 'all'
+  const qURL = url.searchParams.get ('url')
+  const title = url.searchParams.get ('title')
+  const originalCreatedFrom = url.searchParams.get ('original_created_from')
+  const originalCreatedTo = url.searchParams.get ('original_created_to')
+  const createdFrom = url.searchParams.get ('created_from')
+  const createdTo = url.searchParams.get ('created_to')
+  const updatedFrom = url.searchParams.get ('updated_from')
+  const updatedTo = url.searchParams.get ('updated_to')
+  const m: 'all' | 'any' = url.searchParams.get ('match') === 'any' ? 'any' : 'all'
   const page = Number (url.searchParams.get ('page') || 1)
   const limit = Number (url.searchParams.get ('limit') || 20)
 
+  const keys = {
+      tags, match: m, page, limit,
+      ...(qURL && { url: qURL }),
+      ...(title && { title }),
+      ...(originalCreatedFrom && { original_created_from: originalCreatedFrom }),
+      ...(originalCreatedTo && { original_created_to: originalCreatedTo }),
+      ...(createdFrom && { created_from: createdFrom }),
+      ...(createdTo && { created_to: createdTo }),
+      ...(updatedFrom && { updated_from: updatedFrom }),
+      ...(updatedTo && { updated_to: updatedTo }) }
+
   await qc.prefetchQuery ({
-      queryKey: postsKeys.index ({ tags, match: m, page, limit }),
-      queryFn:  () => fetchPosts ({ tags, match: m, page, limit }) })
+      queryKey: postsKeys.index (keys),
+      queryFn:  () => fetchPosts (keys) })
 }
 
 
@@ -103,7 +122,8 @@ const prefetchPostChanges: Prefetcher = async (qc, url) => {
 
 
 export const routePrefetchers: { test: (u: URL) => boolean; run: Prefetcher }[] = [
-    { test: u => u.pathname === '/' || u.pathname === '/posts', run: prefetchPostsIndex },
+    { test: u => ['/', '/posts', '/posts/search'].includes (u.pathname),
+      run: prefetchPostsIndex },
     { test: u => (!(['/posts/new', '/posts/changes', '/posts/search'].includes (u.pathname))
 		  && Boolean (mPost (u.pathname))),
       run: prefetchPostShow },
@@ -119,5 +139,6 @@ export const prefetchForURL = async (qc: QueryClient, urlLike: string): Promise<
   const r = routePrefetchers.find (x => x.test (u))
   if (!(r))
     return
+
   await r.run (qc, u)
 }
diff --git a/frontend/src/pages/posts/PostSearchPage.tsx b/frontend/src/pages/posts/PostSearchPage.tsx
index 41ca095..c8b56fc 100644
--- a/frontend/src/pages/posts/PostSearchPage.tsx
+++ b/frontend/src/pages/posts/PostSearchPage.tsx
@@ -1,6 +1,7 @@
+import { useQuery } from '@tanstack/react-query'
 import { useState } from 'react'
 import { Helmet } from 'react-helmet-async'
-import { useLocation } from 'react-router-dom'
+import { useLocation, useNavigate } from 'react-router-dom'
 
 import PrefetchLink from '@/components/PrefetchLink'
 import TagLink from '@/components/TagLink'
@@ -11,42 +12,56 @@ import Pagination from '@/components/common/Pagination'
 import MainArea from '@/components/layout/MainArea'
 import { SITE_TITLE } from '@/config'
 import { fetchPosts } from '@/lib/posts'
+import { postsKeys } from '@/lib/queryKeys'
 
 import type { FC, FormEvent } from 'react'
 
-import type { Post } from '@/types'
-
 
 export default (() => {
-  const [createdFrom, setCreatedFrom] = useState<string | undefined> ()
-  const [createdTo, setCreatedTo] = useState<string | undefined> ()
-  const [matchType, setMatchType] = useState<'all' | 'any'> ('all')
-  const [originalCreatedFrom, setOriginalCreatedFrom] = useState<string | undefined> ()
-  const [originalCreatedTo, setOriginalCreatedTo] = useState<string | undefined> ()
-  const [tagsStr, setTagsStr] = useState ('')
-  const [title, setTitle] = useState ('')
-  const [updatedFrom, setUpdatedFrom] = useState<string | undefined> ()
-  const [updatedTo, setUpdatedTo] = useState<string | undefined> ()
-  const [url, setURL] = useState ('')
-  const [results, setResults] = useState<Post[]> ([])
-  const [totalPages, setTotalPages] = useState (0)
+  const navigate = useNavigate ()
 
   const location = useLocation ()
   const query = new URLSearchParams (location.search)
   const page = Number (query.get ('page') ?? 1)
   const limit = Number (query.get ('limit') ?? 20)
 
+  const [createdFrom, setCreatedFrom] =
+      useState<string | null> (query.get ('created_from'))
+  const [createdTo, setCreatedTo] =
+      useState<string | null> (query.get ('created_to'))
+  const [matchType, setMatchType] =
+      useState<'all' | 'any'> ((query.get ('match') as 'all' | 'any' | null) ?? 'all')
+  const [originalCreatedFrom, setOriginalCreatedFrom] =
+      useState<string | null> (query.get ('original_created_from'))
+  const [originalCreatedTo, setOriginalCreatedTo] =
+      useState<string | null> (query.get ('original_created_to'))
+  const [tagsStr, setTagsStr] = useState (query.get ('tags') ?? '')
+  const [title, setTitle] = useState (query.get ('title') ?? '')
+  const [updatedFrom, setUpdatedFrom] =
+      useState<string | null> (query.get ('updated_from'))
+  const [updatedTo, setUpdatedTo] =
+      useState<string | null> (query.get ('updated_to'))
+  const [url, setURL] = useState (query.get ('url') ?? '')
+
+  const keys = {
+      tags: tagsStr, match: matchType, page, limit,
+      ...(url && { url }),
+      ...(title && { title }),
+      ...(originalCreatedFrom && { original_created_from: originalCreatedFrom }),
+      ...(originalCreatedTo && { original_created_to: originalCreatedTo }),
+      ...(createdFrom && { created_from: createdFrom }),
+      ...(createdTo && { created_to: createdTo }),
+      ...(updatedFrom && { updated_from: updatedFrom }),
+      ...(updatedTo && { updated_to: updatedTo }) }
+  const { data, /* isLoading: loading */ } = useQuery ({
+      queryKey: postsKeys.index (keys), queryFn: () => fetchPosts (keys) })
+  const results = data?.posts ?? []
+  const totalPages = data ? Math.ceil (data.count / limit) : 0
+
   const search = async () => {
-    const tags = tagsStr.split (' ').filter (e => e !== '')
-    const data = await fetchPosts ({
-	url, title, tags: tags.join (' '), match: matchType,
-	created_from: createdFrom, created_to: createdTo,
-	updated_from: updatedFrom, updated_to: updatedTo,
-	original_created_from: originalCreatedFrom,
-	original_created_to: originalCreatedTo,
-	page, limit })
-    setResults (data.posts)
-    setTotalPages (data ? Math.ceil (data.count / limit) : 0)
+    const qs = new URLSearchParams (location.search)
+    qs.set ('page', String ('1'))
+    navigate (`${ location.pathname }?${ qs.toString () }`)
   }
 
   const handleSearch = (e: FormEvent) => {
@@ -118,11 +133,11 @@ export default (() => {
 	      <Label>オリジナルの投稿日時</Label>
 	      <DateTimeField
 		  value={originalCreatedFrom ?? undefined}
-		  onChange={isoUTC => setOriginalCreatedFrom (isoUTC ?? undefined)}/>
+		  onChange={setOriginalCreatedFrom}/>
 	      <span className="mx-1">〜</span>
 	      <DateTimeField
 		  value={originalCreatedTo ?? undefined}
-		  onChange={isoUTC => setOriginalCreatedTo (isoUTC ?? undefined)}/>
+		  onChange={setOriginalCreatedTo}/>
 	    </div>
 
 	    {/* 投稿日時 */}
@@ -130,11 +145,11 @@ export default (() => {
 	      <Label>投稿日時</Label>
 	      <DateTimeField
 		  value={createdFrom ?? undefined}
-		  onChange={isoUTC => setCreatedFrom (isoUTC ?? undefined)}/>
+		  onChange={setCreatedFrom}/>
 	      <span className="mx-1">〜</span>
 	      <DateTimeField
 		  value={createdTo ?? undefined}
-		  onChange={isoUTC => setCreatedTo (isoUTC ?? undefined)}/>
+		  onChange={setCreatedTo}/>
 	    </div>
 
 	    {/* 更新日時 */}
@@ -142,11 +157,11 @@ export default (() => {
 	      <Label>更新日時</Label>
 	      <DateTimeField
 		  value={updatedFrom ?? undefined}
-		  onChange={isoUTC => setUpdatedFrom (isoUTC ?? undefined)}/>
+		  onChange={setUpdatedFrom}/>
 	      <span className="mx-1">〜</span>
 	      <DateTimeField
 		  value={updatedTo ?? undefined}
-		  onChange={isoUTC => setUpdatedTo (isoUTC ?? undefined)}/>
+		  onChange={setUpdatedTo}/>
 	    </div>
 
 	    {/* 検索 */}