PROBLEM TO BE SOLVED: To provide a sensor unit capable of easily detecting a movement of a living body surface at an appropriate angle. A sensor unit 1 according to an aspect of the present invention is a sensor unit 1 capable of detecting expansion and contraction of a living body surface, and includes a plurality of thread-like or band-shaped strain sensor elements 2 that expand and contract in the longitudinal direction, and a plurality of strain sensor elements 2. A holding member 3 which is connected to the strain sensor element 2 and determines the positional relationship of these strain sensor elements 2 with respect to the biological surface is provided, and at least the central axes of the pair of strain sensor elements 2 intersect with each other. [Selection diagram] Fig. 1【課題】本発明は、生体表面の動きを適切な角度で容易に検出することができるセンサユニットの提供を課題とする。【解決手段】本発明の一態様に係るセンサユニット１は、生体表面の伸縮を検出可能なセンサユニット１であって、長手方向に伸縮する糸状又は帯状の複数の歪センサ素子２と、複数の歪センサ素子２に接続され、これらの歪センサ素子２の生体表面に対する位置関係を定める保持部材３とを備え、少なくとも一対の歪センサ素子２の中心軸同士が交差している。【選択図】図１
