The perpendicular band of the E1 u vibration ν14 of C 6H 6, with band origin at 1038.2670 cm -1, was measured on a Bomem high-resolution Fourier transform spectrometer with a 246-cm optical path difference. The spectrum was deconvolved to an effective linewidth of ∼0.002 cm -1. A total of 135 subbands have been assigned in the ν14 band. The band was found to be remarkably free of perturbations by other states. A Hamiltonian matrix of order 2, including merely the rotational l-type resonances between the ν14+( J, K) and ν14-( J, K - 2) levels, was used for the treatment of the upper states of this band. A set of accurate spectroscopic constants was obtained, which reproduces a total of 3258 measured lines with an over-all standard deviation of 0.0006 cm -1.