diff --git a/proc_macros/proc_macros.rs b/proc_macros/proc_macros.rs
index 4e2a9e8..8b3d5bd 100644
--- a/proc_macros/proc_macros.rs
+++ b/proc_macros/proc_macros.rs
@@ -9,6 +9,7 @@ use syn::token;
 use syn::Block;
 use syn::Expr;
 use syn::Ident;
+use syn::ItemEnum;
 use syn::ItemFn;
 use syn::Lit;
 use syn::LitBool;
@@ -580,3 +581,42 @@ pub fn check_json_keys(item: TokenStream) -> TokenStream {
     );
     stream.into()
 }
+
+#[proc_macro_derive(CheckUnkown)]
+pub fn derive_check_unknown(item: TokenStream) -> TokenStream {
+    let ItemEnum {
+        attrs: _,
+        vis: _,
+        enum_token: _,
+        ident,
+        generics: _,
+        brace_token: _,
+        variants,
+    } = parse_macro_input!(item as ItemEnum);
+    let mut streams = Vec::new();
+    for i in variants.iter() {
+        let ident = i.ident.clone();
+        let s = ident.to_string();
+        if s == "Unknown" {
+            streams.push(
+                quote!(Self::#ident(data) => Err(crate::fanbox::error::FanboxAPIError::from(format!(
+                "{} {}",
+                crate::gettext("Failed to recognize type:"),
+                data
+            ))),),
+            );
+        } else {
+            streams.push(quote!(Self::#ident(tmp) => crate::fanbox::check::CheckUnkown::check_unknown(tmp),));
+        }
+    }
+    let stream = quote!(
+        impl crate::fanbox::check::CheckUnkown for #ident {
+            fn check_unknown(&self) -> Result<(), crate::fanbox::error::FanboxAPIError> {
+                match self {
+                    #(#streams)*
+                }
+            }
+        }
+    );
+    stream.into()
+}
diff --git a/src/fanbox/article/block.rs b/src/fanbox/article/block.rs
index 2bb7173..3f55fbe 100644
--- a/src/fanbox/article/block.rs
+++ b/src/fanbox/article/block.rs
@@ -1,4 +1,5 @@
 use super::super::check::CheckUnkown;
+use super::super::error::FanboxAPIError;
 use json::JsonValue;
 use proc_macros::check_json_keys;
 use std::fmt::Debug;
@@ -26,8 +27,8 @@ impl FanboxArticleParagraphBoldStyle {
 }
 
 impl CheckUnkown for FanboxArticleParagraphBoldStyle {
-    fn check_unknown(&self) -> Result<(), crate::fanbox::error::FanboxAPIError> {
-        check_json_keys!("offset"+, "length"+,);
+    fn check_unknown(&self) -> Result<(), FanboxAPIError> {
+        check_json_keys!("offset"+, "length"+, "type",);
         Ok(())
     }
 }
@@ -41,7 +42,7 @@ impl Debug for FanboxArticleParagraphBoldStyle {
     }
 }
 
-#[derive(Debug)]
+#[derive(proc_macros::CheckUnkown, Debug)]
 pub enum FanboxArticleParagraphStyle {
     Bold(FanboxArticleParagraphBoldStyle),
     Unknown(JsonValue),
@@ -92,6 +93,21 @@ impl FanboxArticleParagraphBlock {
     }
 }
 
+impl CheckUnkown for FanboxArticleParagraphBlock {
+    fn check_unknown(&self) -> Result<(), FanboxAPIError> {
+        check_json_keys!("styles", "text"+, "type",);
+        match self.styles() {
+            Some(styles) => {
+                for style in styles {
+                    style.check_unknown()?;
+                }
+            }
+            None => {}
+        }
+        Ok(())
+    }
+}
+
 impl Debug for FanboxArticleParagraphBlock {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         f.debug_struct("FanboxArticleParagraphBlock")
@@ -101,7 +117,7 @@ impl Debug for FanboxArticleParagraphBlock {
     }
 }
 
-#[derive(Debug)]
+#[derive(proc_macros::CheckUnkown, Debug)]
 pub enum FanboxArticleBlock {
     Paragraph(FanboxArticleParagraphBlock),
     Unknown(JsonValue),