THE Ar-N2 complex plays an important role in atmosphere chemistry. Recently, the potential energy functions (PEF) CPV['], BTT['], MMSV[~], M3svr4] , MMSV'[~] have been determined by comparing the relevant experimental information, such as the molecular beam scattering measurements, virial coefficient data, bulk transport and relaxation phenomena, pressure-broadening and shift of spectroscopic infrared and Raman lines. The pure rotational spectrum of the A ~ ' ~ N ~ , k ' ' ~ ~ , and Ar-14y ' s ~ isotopomers have been measured by Jager and err^[^* 'I using a cavity microwave Fourier-transform spectrometer with a pulsed jet. These observed data have provided direct information for studying the radial dependence of the potential energy surface (PES) . Since the dissociation energy of the van der Waals (vdW) bond of the Ar-N2 complex is small (77.96 cm-') , the vibrational states (even in the ground state) exhibit large amplitude motions, which lead the wavefunction to be delocalized over a large range on PES. The solution of the rovibrational Schrodinger equation for the vdW complex is more difficult than that for the stable molecule. In this note, calculations of the rovibrational states of the Ar-N2 complex have been carried out using the five potential energy functions and employing the DVR3D code of Tennyson et u1. The dipole transition line strengths of the rovibrational states for J = 1 to the ground state of the Ar-N2 complex have been obtained using both DVR3D and DIPOLE3 codes. In the present calculation, the wavefunction of Ar-N2 complex is expanded as the product of the radial basis function 9, ( R ) and the symmetrized angular basis functions generated by 50 spherical harmonics. A y, ( R ) is expanded with 40 Morse-oscillator-like functions defined by the Morse parameters Re = 11 . 6ao , D, = 8 . 5 x 10-'a. u. and we = 2.2 x 10 -' a. u . , where De is the dissociation energy, w e is the fundamental frequency and R , is the reference bond-length.