Abstract. We present results derived from the analysis of XMM-NEWTON archive data of some NLS1 galaxies with an objective to investigate the nature of soft excess in the X-ray band below 2.5 keV. The spectrum in the energy range between 2.5 - 10 keV can be easily represented by a single power law with photon index ∼ 2.5, however, an excess emission of soft component is clearly evident if its lower energy limit is extended to 0.3 keV. This excess emission at soft energy is perhaps due to the inverse Comptonization of low energy photons by relativistic electrons in the accretion disk. The issue regarding origin of this excess emission is addressed by fitting different models to the X-ray data.