A living body measurement apparatus according to the present invention functions both as a muscular tissue hardness tester for measuring hardness of muscular tissue of a living body and as an algesiometer for measuring a degree of sense of pain of the living body, and the apparatus includes: an contacting section which includes a first contact surface contacting the living body, and which applies pressure to the living body; an auxiliary section which includes a second contact surface contacting the living body, and which supports the second contact surface so that the second contact surface perform reciprocating movement between a coplanar position in which the second contact surface is disposed substantially coplanar with the first contact surface and a retracted position in which the second contact surface is retracted with respect to the first contact surface; and a locking mechanism which locks the auxiliary section in a state in which the second contact surface is disposed at the retracted position.