A measuring apparatus (100, 200, 300, 400) is an optical measuring apparatus provided with a probe portion (20, 20a, 20b, 20c) and a main body portion (10, 10b, 10c), which are electrically connected to each other. The probe portion has: a light source (21, 26) a reference voltage generating device (24) configured to apply predetermined reference voltage to the main body portion and a storing device (25) configured to store therein in advance current adjustment information, which is information for adjusting a drive current to be supplied to the light source. The main body portion has: a drive current supplying device (12, 12a, 12b) configured to supply the drive current to the light source, due to the applied reference voltage and a controlling device (11) configured to control the drive current supplying device on the basis of the stored current adjustment information.
