The present invention discloses surface plasmon resonance phenomenon measuring equipment comprising: (1) a prism, (2) a sensor wherein a plurality of measuring cells are formed in m rows and n columns on the bottom face of the prism, (3) a light source for radiating a laser beam, (4) a first optical system wherein m optical units each having a rectangular parallelepiped shape and having a translucent film formed along the diagonal surface of the rectangular parallelepiped are arranged continuously, (5) a second optical system wherein mn optical units are arranged continuously and a reflected lights group is radiated toward the measuring cells, (6) a photodiode array detectors group of m rows and n columns, arranged on the extensions of reflected lights group, and (7) a polarizer interposed between the first optical system and the prism, and/or between the prism and the photodiode array detectors.