The infrared spectrum of the C-H bending vibration band v4 of chloroform around 1220 cm-' has been measured with a Fourier transform spectrometer at an instrumental resolution of 0.0018 cm-I. An isotopically pure sample of C H~~C~~ was used. More than 3000 lines were assigned in the very congested spectrum. In the analysis the ground state rotational constants were fixed. The model included t(2,2)-resonance and altogether 16 free parameters. The fit gave, for example, the molecular parameters vo = 1220.338 03 (5) cm-', aB -0.068 850 (37) x 41 -lop3 cm-', a: = 0.012 37(17) x lop3 cm I , (CT), = 0.056 036 2(18) c m and q4 = 0.177 56 (15) x cm-'.