In this study, to enhance the thinning and crystallization of poly(ethylene terephthalate) (PET) fibers in the web, PET fiber webs were prepared through the laser-heated electrospinning (LES) and subsequent planar or equi-biaxial stretching process, and structure and properties of the obtained webs were evaluated. For comparison, similar evaluation was also performed for planarly or equi-biaxially stretched PET films. For both planarly and equi-biaxially stretched web samples, the average fiber diameter decreased with an increase in the stretch ratio, while the average fiber diameter hardly changed when the stretch ratio exceeded MD¡ÑTD = 3 ¡Ñ 1 for the planar stretching and MD¡ÑTD = 3 ¡Ñ 3 for the equi-biaxial stretching. Ultimately, nanofiber webs with the average fiber diameter of about 1 ƒÝm and its coefficient of variation (CV) of 20-25% were obtained. As a result of wide angle X-ray diffraction (WAXD) measurement, appearance of only an amorphous halo was confirmed for the un-stretched film and web samples. For the samples of planer stretching, concentration of reflection intensities along the TD direction, which corresponds to the crystalline orientation along the MD, was confirmed both for the film and web samples. The intensity concentration along the azimuthal direction was clearer for the film sample. In the case of simultaneous equi-biaxial stretching, crystalline reflections of isotropic ring appeared for both web and film samples. Comparing the reflection intensities of different crystal planes, it was confirmed that with increasing the stretch ratio the film samples exhibited the preferential orientation of (100) plane, which includes benzene ring in the main chain of PET, along the film surface, while preferential orientation of only molecular chain along the web surface was confirmed for the web samples.