A non-invasive living body measurement device (1) includes: a platform (21) for placement of a finger (8) of a subject that is a measurement target; a light emitting apparatus (3) equipped with light emitting blocks (311 to 316) arranged in a column along the lengthwise direction of the finger (8) placed on the platform (21); a light amount adjustment unit (5) that adjusts the light amounts of the light emitting blocks (311 to 316) such that the light amounts of the transmitted light that passed through the finger (8) placed on the platform (21) are uniform with respect to the lengthwise direction of the finger (8); an imaging unit (4) that obtains an image of the finger (8) placed on the platform (21) by receiving transmitted light that passed through the finger when light was emitted from the light emitting blocks (311 to 316); and an information processing unit that detects biological information regarding the subject by processing the image obtained by the imaging unit (4).