PROBLEM TO BE SOLVED: To provide a fishing line cutting tool configured so that a heating element is not easily deformed. A fishing line cutting tool (1) has a battery (51) and a heating element (33) having a cutting section (335) for cutting the fishing line by heat fusion based on an electric current received from the battery (51), a front side is open, and a back side is opened. In addition, the heating unit 33 is held so that the cutting portion 335 is exposed, and a fixing unit having a guide portion that guides the fishing line entering from the opening to the cutting portion 335 is provided. [Selection diagram] Figure 1【課題】発熱体が変形しにくいように構成された釣糸切断具を提供する。【解決手段】釣糸切断具１は、バッテリ５１と、バッテリ５１から受けた電流を基にした熱溶融により釣糸を切断するための切断部３３５を有する発熱体３３と、前側が開口し、奥側において切断部３３５が露出するように発熱体３３を保持するとともに、開口から入ってきた釣糸を切断部３３５に案内する案内部を有する固定ユニットとを備えている。【選択図】図１
