Abstract. We present results obtained from the near-infrared spectroscopic observations of the Be X-ray binary pulsar A0535+262 at different phases of its $\sim$111 day orbital period. The binary companion of the pulsar HDE 245770 is an O9.7-B0 IIIe star in a relatively wide eccentric orbit. The pulsar shows regular X-ray outbursts with the orbital periodicity during which, the X-ray luminosity increases up to as high as three orders of magnitude. To investigate the effect of the X-ray outbursts on the optical/infrared emission from the binary companion, observations of the Be star were carried out using the 1.2 m telescope at Mt. Abu IR observatory. Near-IR spectroscopy of the object shows that the JHK spectra are dominated by the emission lines of hydrogen Brackett and Paschen series and He I. The strengths of these (prominent) lines are enhanced during the X-ray outburst phase compared to that of the X-ray quiescent phase. The He I lines at 1.0830 micron and 2.0585 micron are found to be very strong during the X-ray outburst phase. Along with these He I lines, we also detected an emission He I line at 1.7002 micron. This He I line is found to be present only during the X-ray outburst and vanishes during the X-ray quiescent phase. The details of the near-IR observations will be discussed.