Morphology and growth mechanism of spherulite crystallized from nematic meso-phase of poly-p-benzamide in 100％ H2SO4 have been studied by hot-stage polarizing microscopy and transmission electron microscopy．It is shown that nematic mesophase of PBA possesses a supercooled state．The degree of supercooIing reached 30—40℃ whereby spherulites were formed．It was f ound that there are three types of PBA spherulites formed from a 20 wt％ solution．The orientational arrangments of domains which play the role of fundamental structu ral units of PBA spherulite are different when spherulites arc formed from various supercooled states of the nematie mesophase．The morphology of PBA spherulites has been found to be dependent on the degree of su-percooling only，being independent of the eoncentration of the solution．Various growth mechanisms of PBA spherulites have been discussed．