The visible absorption spectrum of liquid ethylene at ≈ 108 K from 5500 Å to 7200 Å was measured by using a pulsed tunable dye laser, immersed-transducer, gated-detection opto-acoustic spectroscopy technique. The absorption features show the strongest band with an absorption coefficient of ≈2 × 10 -2 cm -1 and the weakest band with an absorption coefficient of ≈1 × 10 -4 cm -1 . Proposed assignments of the observed absorption peaks involve combinations of overtones of local and normal modes of vibration of ethylene.