diff --git a/docs/supportedsites.md b/docs/supportedsites.md
index df2ee955..157b3768 100644
--- a/docs/supportedsites.md
+++ b/docs/supportedsites.md
@@ -100,7 +100,7 @@ Consider all listed sites to potentially be NSFW.
 <tr>
     <td>Arcalive</td>
     <td>https://arca.live/</td>
-    <td>Boards, Posts</td>
+    <td>Boards, Posts, User Posts</td>
     <td></td>
 </tr>
 <tr>
diff --git a/gallery_dl/extractor/arcalive.py b/gallery_dl/extractor/arcalive.py
index db99313f..f28ac23e 100644
--- a/gallery_dl/extractor/arcalive.py
+++ b/gallery_dl/extractor/arcalive.py
@@ -22,6 +22,13 @@ class ArcaliveExtractor(Extractor):
     def _init(self):
         self.api = ArcaliveAPI(self)
 
+    def items(self):
+        for article in self.articles():
+            article["_extractor"] = ArcalivePostExtractor
+            board = self.board or article.get("boardSlug") or "breaking"
+            url = "{}/b/{}/{}".format(self.root, board, article["id"])
+            yield Message.Queue, url, article
+
 
 class ArcalivePostExtractor(ArcaliveExtractor):
     """Extractor for an arca.live post"""
@@ -99,18 +106,26 @@ class ArcalivePostExtractor(ArcaliveExtractor):
 class ArcaliveBoardExtractor(ArcaliveExtractor):
     """Extractor for an arca.live board's posts"""
     subcategory = "board"
-    pattern = BASE_PATTERN + r"/b/(\w+)(?:/?\?([^#]+))?$"
+    pattern = BASE_PATTERN + r"/b/([^/?#]+)/?(?:\?([^#]+))?$"
     example = "https://arca.live/b/breaking"
 
-    def items(self):
-        board, query = self.groups
+    def articles(self):
+        self.board, query = self.groups
         params = text.parse_query(query)
-        articles = self.api.board(board, params)
+        return self.api.board(self.board, params)
 
-        for article in articles:
-            article["_extractor"] = ArcalivePostExtractor
-            url = "{}/b/{}/{}".format(self.root, board, article["id"])
-            yield Message.Queue, url, article
+
+class ArcaliveUserExtractor(ArcaliveExtractor):
+    """Extractor for an arca.live users's posts"""
+    subcategory = "user"
+    pattern = BASE_PATTERN + r"/u/@([^/?#]+)/?(?:\?([^#]+))?$"
+    example = "https://arca.live/u/@USER"
+
+    def articles(self):
+        self.board = None
+        user, query = self.groups
+        params = text.parse_query(query)
+        return self.api.user_posts(text.unquote(user), params)
 
 
 class ArcaliveAPI():
@@ -132,6 +147,12 @@ class ArcaliveAPI():
         endpoint = "/view/article/breaking/" + str(post_id)
         return self._call(endpoint)
 
+    def user_posts(self, username, params):
+        endpoint = "/list/channel/breaking"
+        params["target"] = "nickname"
+        params["keyword"] = username
+        return self._pagination(endpoint, params, "articles")
+
     def _call(self, endpoint, params=None):
         url = self.root + endpoint
         response = self.extractor.request(url, params=params)
diff --git a/scripts/supportedsites.py b/scripts/supportedsites.py
index faa5c603..07961a43 100755
--- a/scripts/supportedsites.py
+++ b/scripts/supportedsites.py
@@ -201,6 +201,9 @@ SUBCATEGORY_MAP = {
         "user-series"  : "",
         "user-bookmark": "Bookmarks",
     },
+    "arcalive": {
+        "user": "User Posts",
+    },
     "artstation": {
         "artwork": "Artwork Listings",
         "collections": "",
diff --git a/test/results/arcalive.py b/test/results/arcalive.py
index 8dcdc7bb..bb4e6b09 100644
--- a/test/results/arcalive.py
+++ b/test/results/arcalive.py
@@ -120,11 +120,56 @@ __tests__ = (
 },
 
 {
-    "#url"      : "https://arca.live/b/arknights",
-    "#class"    : arcalive.ArcaliveBoardExtractor,
+    "#url"    : "https://arca.live/b/arknights",
+    "#class"  : arcalive.ArcaliveBoardExtractor,
     "#pattern": arcalive.ArcalivePostExtractor.pattern,
-    "#range"    : "1-100",
-    "#count"    : 100,
+    "#range"  : "1-100",
+    "#count"  : 100,
+
+    "category"    : {str, None},
+    "categoryDisplayName": {str, None},
+    "commentCount": int,
+    "createdAt"   : str,
+    "id"          : int,
+    "isUser"      : bool,
+    "?mark"       : str,
+    "nickname"    : str,
+    "publicId"    : {int, None},
+    "ratingDown"  : int,
+    "ratingUp"    : int,
+    "thumbnailUrl": {str, None},
+    "title"       : str,
+    "viewCount"   : int,
+},
+
+{
+    "#url"  : "https://arca.live/u/@Si%EB%A6%AC%EB%A7%81",
+    "#class": arcalive.ArcaliveUserExtractor,
+    "#range": "1-5",
+    "#urls" : (
+        "https://arca.live/b/vrchat/107257886",
+        "https://arca.live/b/soulworkers/95371697",
+        "https://arca.live/b/arcalivebreverse/90843346",
+        "https://arca.live/b/arcalivebreverse/90841126",
+        "https://arca.live/b/arcalivebreverse/90769916",
+    ),
+
+    "boardName"   : str,
+    "boardSlug"   : {"vrchat", "soulworkers", "arcalivebreverse"},
+    "category"    : {str, None},
+    "categoryDisplayName": {str, None},
+    "commentCount": int,
+    "createdAt"   : str,
+    "id"          : int,
+    "isUser"      : True,
+    "?mark"       : "image",
+    "nickname"    : "Si리링",
+    "publicId"    : {int, None},
+    "ratingDown"  : int,
+    "ratingUp"    : int,
+    "thumbnailUrl": {str, None},
+    "title"       : str,
+    "viewCount"   : int,
 },
 
 )