A biosensor equipped with a pressure-sensitive adhesive layer for affixation to a living body surface, a stretchable substrate layer disposed on the upper surface of the pressure-sensitive adhesive layer, a probe disposed on the lower surface of the pressure-sensitive adhesive layer, and an electronic component mounted on the substrate layer so as to be connected to the probe, the total thickness of the pressure-sensitive adhesive layer and the substrate layer being at least 1 [mu]m and less than 100 [mu]m.本發明之生物體感測器具備：感壓接著層，其係用以貼附於生物體表面；基材層，其配置於感壓接著層之上表面且具有伸縮性；探針，其配置於感壓接著層之下表面；及電子零件，其係以與探針連接之方式安裝於上述基材層；並且感壓接著層與基材層之總厚度為1 μm以上且未達100 μm。
