Biological information measuring apparatus capable of automatically identifying a subject under test, and executing continuous measurement under a common measurement condition having selected a properly identified site at a high S/N ratio for relatively long hours as necessary, and also improving utilization efficiency of the output light of a laser. In the biological information measuring apparatus using a confocal optical system provided with a laser serving as a light source thereof, the biological information measuring apparatus comprises a laser drive means (14) for effecting AC-driving so as to cause pulsed light to be outputted from the laser, and wherein the skin of a finger (FG) is discriminated from a nail (a) thereof on the basis of a detection signal of the confocal optical system, and a portion of the skin, in a range of the nail epithelium (b) of the finger (FG) to the first joint (c) thereof, is indicated as a measurement region.
