A pulsator of washing machine and a washing machine, a base body (1) of the pulsator is disk-shaped. A central portion (4) is arranged at and protrudes from a center of the base body (1) of the pulsator, on an upper surface of the base body is provided with and a stirring blade (2) protruding the base body and a groove (3), the stirring blade extends from the central portion (4) of the base body (1) to a outer periphery of the base body (1). Moreover, a bottom surface of the base body (1) is provided with a smoothly undulating surface corresponding to the upper surface. The undulating surface does not stiffly protrude from the bottom surface of the base body (1), so there is no hard angle formed between the undulating surface, or between the undulating surface and the other surface of the base body (1). In addition, the pulsator does not divide the bottom surface of the pulsator into a plurality of small areas like the existing pulsator, but has a large overall surface with the undulating surface, which reduc
