『字彙補』（じいほ）は、清の呉任臣
（中国語版）（ごじんしん）によって編纂された、『字彙』を補足訂正した書物。康熙5年（1666年）序。『康熙字典』に出典のひとつとして使われている。著者の呉任臣は字を志伊といい、ほかに『十国春秋』『山海経広注』などの著作がある[1]。呉任臣は『字彙』が優秀であることを認めながら、古典や大蔵経・道蔵などの字が載っていないことが多いのを欠点として、その追補を作った。
『字彙』と同じ214部首に従い、部首ごとに「補字」（字を補う）「補音義」（音義を補う）「較譌」（誤りを正す）の3点について補っている。
全体で補字が12,371字、補音義が5,525字、較譌が269字ある[2]。
較譌の例として、『字彙』の「候」の字を「.mw-parser-output .cjkext{font-family:"源ノ角ゴシック JP Normal","Noto Sans CJK JP DemiLight","ヒラギノ角ゴ 簡体中文 W3","ヒラギノ角ゴ 簡体中文","Hiragino Sans GB W3","Hiragino Sans GB","STHeiti SC","STHeitiSC-Medium","Microsoft YaHei","Droid Sans Fallback","Han-Nom Gothic","SimSun-ExtB","BabelStone Han","Nom Na Tong","WenQuanYi Zen Hei","和田研中丸ゴシック2004絵文字","和田研細丸ゴシック2004絵文字","YOzFont","DFSongStd","HAN NOM A","Sun-ExtA","Code2000","HAN NOM B","Sun-ExtB","花園明朝 A Regular",HanaMinAX,"花園明朝 B Regular","花園明朝 C Regular","花園明朝 C",HanaMinBX,"花園明朝A","花園明朝B",HanaMinA,HanaMinB}.mw-parser-output .cjkext-A{font-family:"源ノ角ゴシック","Noto Sans CJK JP","STHeiti SC","STHeitiSC-Medium","Microsoft YaHei","BabelStone Han","Droid Sans Fallback","Adobe Heiti Std R","Adobe Heiti Std","Han-Nom Gothic","DFSongStd","WenQuanYi Zen Hei","HAN NOM A","Sun-ExtA","Code2000","花園明朝 A Regular","花園明朝 A",HanaMinAX,"FZKaiS-Extended","CJK統合漢字拡張A","花園明朝A",HanaMinA}.mw-parser-output .cjkext-B{font-family:"SimSun-ExtB","HAN NOM B","Sun-ExtB","BabelStone Han","花園明朝 B Regular","花園明朝 B",HanaMinBX,"FZKaiS-Extended(SIP)","CJK統合漢字拡張B","花園明朝B",HanaMinB}.mw-parser-output .cjkext-C{font-family:"花園明朝 C Regular","花園明朝 C","CJK統合漢字拡張C",gw061889,"Sun-ExtB","花園明朝 B Regular","花園明朝 B",HanaMinBX,"和田研中丸ゴシック2004絵文字",WadaLabChuMaruGo2004Emoji,"和田研細丸ゴシック2004絵文字",WadaLabMaruGo2004Emoji,"BabelStone Han","FZKaiS-Extended(SIP)","UKai-ExtC","花園明朝B",HanaMinB}.mw-parser-output .cjkext-D{font-family:"花園明朝 C Regular","花園明朝 C","BabelStone Han","UCS-ALL-EXTD",gw936381,"花園明朝 B Regular","花園明朝 B",HanaMinBX,"Sun-ExtB","FZKaiS-Extended(SIP)","花園明朝B",HanaMinB}.mw-parser-output .cjkext-E{font-family:"花園明朝 C Regular","花園明朝 C","UCS-ALL-EXTE",gw1289725,"花園明朝B","HanaMinB","BabelStone Han"}.mw-parser-output .cjkext-F{font-family:"花園明朝 C Regular","花園明朝 C","UCS-ALL-EXTF","花園明朝B","HanaMinB","BabelStone Han"}.mw-parser-output .cjkext-G{font-family:"UCS-ALL-EXTF","BabelStone Han"}.mw-parser-output .cjkext-stroke{font-family:"源ノ角ゴシック JP Normal","Noto Sans CJK JP DemiLight","和田研中丸ゴシック2004絵文字","和田研細丸ゴシック2004絵文字","BabelStone Han","MingLiU","MingLiU_HKSCS",Code2000,"Sun-ExtA","花園明朝 A Regular","花園明朝 A",HanaMinAX,"花園明朝A",HanaMinA}.mw-parser-output .cjkext-radical{font-family:"源ノ角ゴシック JP Normal","Noto Sans CJK JP DemiLight","ヒラギノ角ゴ 簡体中文 W3","ヒラギノ角ゴ 簡体中文","Hiragino Sans GB W3","Hiragino Sans GB","BabelStone Han","Nom Na Tong","HAN NOM A","Sun-ExtA","花園明朝 A Regular","花園明朝 A",HanaMinAX,"YOzFont","和田研中丸ゴシック2004絵文字","和田研細丸ゴシック2004絵文字",Code2000,"花園明朝A","HanaMinA","FZKaiS-Extended"}.mw-parser-output .cjkext-ci{font-family:"源ノ角ゴシック JP Normal","Noto Sans CJK JP DemiLight","Droid Sans Fallback","Arial Unicode MS","BabelStone Han","DFSongStd","花園明朝 A Regular","花園明朝 A",HanaMinAX,Code2000,"CJK互換漢字","花園明朝A",HanaMinA}.mw-parser-output .cjkext-cis{font-family:"HAN NOM B","CJK互換漢字補助","Sun-ExtB","花園明朝 B Regular","花園明朝 B",HanaMinBX,"花園明朝A",HanaMinA}.mw-parser-output .cjkext-20bb7{font-family:"源真ゴシック Regular","源ノ角ゴシック Normal","源ノ角ゴシック JP Normal","Noto Sans CJK JP DemiLight","ヒラギノ角ゴ Pro W3","ヒラギノ角ゴ Pro","Hiragino Kaku Gothic Pro","メイリオ","Meiryo UI","A-OTF 新ゴ Pr5 R","A-OTF 新ゴ Pr6N R","小塚ゴシック Pr6N M","小塚ゴシック Pro M","VL Pゴシック","Migu 1P","IPAmj明朝","BabelStone Han","HAN NOM B","和田研中丸ゴシック2004ARIB","和田研中丸ゴシック2004絵文字","和田研細丸ゴシック2004ARIB","和田研細丸ゴシック2004絵文字","YOzFont","Sun-ExtB","花園明朝 B Regular",HanaMinBX}?」に直すなど、『字彙』が一般に行われている字を取ったのに対して、『字彙補』は古い書籍に根拠のある字を正としている[3]。
脚注^ 『清史稿』巻484・文苑列伝一・呉任臣
表
話
編
歴
漢語辞書
前近代
正字通
康熙字典
新撰字鏡
類聚名義抄
異体字弁
和字正俗通
訓詁
爾雅
小爾雅
広雅
?雅
方言
釈名
韻書
切韻
唐韻
広韻
集韻
礼部韻略
五音集韻
平水韻
古今韻会挙要
蒙古字韻
中原音韻
洪武正韻
戚林八音(中国語版)
佩文韻府
分韻撮要
近現代