A watch band with a buckle which does not slip off from a band body thereof even when it gets a great shock, for example from collision with an object due to dropping thereof, and a wristwatch with such band. The band body has a pair of spaced attaching parts provided at an end thereof. An engaging member has a connection part connected through a connection pipe to between these attaching parts. A buckle has a pair of arms which hold these attaching parts therebetween. A pair of screws have a thread portion screwed into a screw hole in the end portion of an associated arm of the buckle and a shank part inserted in a nearer end portion of the connection pipe to attach the buckle to the band body so as not to slip off from the connection pipe even when the buckle gets a great shock.