Nonwoven fabric including concaves and convexes, and at least a fiber basis weight which is adjusted, and its manufacturing method are provided. The nonwoven fabric 110 is formed into a substantially sheet-like shape of predetermined thickness and its fiber basis weight is adjusted by directing a fluid, mainly consisting of gas, to a fiber web 100, the fibers of which have a high degree of freedom to move. The nonwoven fabric 110 includes a plurality of groove portions 1, which are low basis weight portions, and a plurality of convex portions 2, which are high basis weight portions, that are continuously formed along the groove portions 1 and are adjacent to each of the plurality of groove portions 1. The Fiber basis weights of the plurality of groove portions 1 are less than those of the plurality of convex portions 2.