PROBLEM TO BE SOLVED: To provide an endoscope, an endoscope apparatus, an impact detection method, and an impact detection program capable of detecting that an impact that may cause a failure of an image pickup element is applied to a rigid portion at the tip of an insertion portion. An endoscope (1) having a hard portion (tip portion (10C)) at the tip of an insertion portion (10) is arranged in an imaging element (23) arranged in the tip portion (10C) and an insertion portion (10) including the tip portion (10C). The light guide 31 and the light reflecting member 32 provided at the end of the light guide 31 inside the tip portion 10C are provided. At least a part (second light guide 31b) of the inside of the tip portion 10C of the light guide 31 has lower impact resistance than the other part (first light guide 31a) of the light guide 31. [Selection diagram] Figure 2【課題】撮像素子の故障が生じ得るような衝撃が挿入部先端の硬性部に加わったことを検出可能にする内視鏡、内視鏡装置、衝撃検出方法、及び衝撃検出プログラムを提供する。【解決手段】挿入部１０先端に硬性部（先端部１０Ｃ）を有する内視鏡１は、先端部１０Ｃ内に配置された撮像素子２３と、先端部１０Ｃを含む挿入部１０内に配置されたライトガイド３１と、ライトガイド３１の先端部１０Ｃ内の端部に設けられた光反射部材３２と、を備える。ライトガイド３１の先端部１０Ｃ内の部分の少なくとも一部（第二のライトガイド３１ｂ）は、ライトガイド３１の他の部分（第一のライトガイド３１ａ）と比較して耐衝撃性が低い。【選択図】図２
