A synthetic resin bottle has a cylindrical shape with a bottom, and a bottom wall portion that includes a grounding portion located at an outer circumferential edge, a rising circumferential wall portion that is connected from an inner side to the grounding portion and extends upward, an annular movable wall portion protruding from an upper end of the rising circumferential wall portion toward the bottle radial inner side, and a recessed circumferential wall portion between the bottle radial inner side and the movable wall portion. The movable wall portion is free to rotate around a portion connected to the rising circumferential wall portion so as to move the recessed circumferential wall portion in an upward direction. The rising circumferential wall portion extends to be gradually inclined toward the bottle inner side, and an inclined angle thereof is equal to or less than 10° with respect to a bottle axis.