The insertion assisting tool according to the present invention is an insertion assisting tool (21) that assists the insertion when the insertion member (20) having a hard tip is inserted into the inside of the sinus or to the opening leading to the sinus, The guide part (211) which makes the elongate shape which the one end side curved, guides the insertion path route of an insertion member (20), the holding part which can hold maintain an insertion member (20), and a holding part are connected, and a guide part (211) ) And a support part (212) that supports the other end of the guide part (211).本発明に係る挿入補助具は、硬質の先端部を有する挿入部材（２０）を副鼻腔の内部または副鼻腔に通じる開口まで挿入する際の挿入を補助する挿入補助具（２１）であって、一端側が湾曲した長尺状をなし、挿入部材（２０）の挿入経路を案内する案内部（２１１）と、挿入部材（２０）を保持可能な保持部と、保持部に連なり、案内部（２１１）に沿って移動可能な移動部とを有する被案内部（２１３）と、案内部（２１１）の他端を支持する支持部（２１２）と、を備えた。
