Abstract. W4 H II region, a part of large cloud complex W3/W4/W5 in the Perseus arm, is a good candidate to study the induced star formation at the peripheries due to the joint effect of several massive stars. We present the preliminary results of our optical and archival infrared (2MASS and Spitzer) photometry of the H II region. We identified several young stellar objects (YSOs; Class I and Class II) using near and mid-infrared colour-colour diagrams. The non-asymmetric distribution of the YSO candidates indicates triggered star formation in the bright-rimmed clouds associated with the H II region.