We have obtained the infrared absorption spectrum of the jet-cooled C6H6 in the 800-5000 cm(-1) region using step-scan Fourier transform infrared spectrometer combined with a pulsed supersonic jet system. The experimental spectrum was in good agreement with the convolution spectrum of the monomer band with the rotational temperature of similar to37 K and the broadbands of liquid C6H6, indicating the first spectroscopic evidence for the formation of supercooled liquid C6H6 cluster in the supersonic jet. (C) 2002 Elsevier Science B.V. All rights reserved.