An electric power tool with a vibration mechanism including: a final output shaft that protrudes forward of a housing accommodating a motor and to which rotation is transmitted from the motor; and a vibration mechanism that is adapted to provide vibration in an axial direction to the final output shaft, the vibration mechanism including a first cam secured integrally to the final output shaft, a second cam that interlocks with a rear of the first cam and is fitted to an exterior of the final output shaft so as to be rotatable, and a vibration switching member that is provided in a rear of the second cam to be movable forward or backward between a forward position in which the vibration switching member is latched onto the second cam so as to restrict rotation and a backward position in which the vibration switching member is apart from the second cam, wherein the vibration switching member is adapted to be moved forward or backward through manipulation of a switching operation member provided to the housing, wherein the vibration switching member is a ring body; and a link plate that is provided between the switching operation member and the vibration switching member, a front end of the link plate latching to a front surface of the vibration switching member from an outer circumference side and a rear end of the link plate engaging with the switching operation member, the electric power tool characterized in that the ring body, in the forward position, is fitted to an exterior of the second cam to cause a latching portion provided in its inner circumference to latch onto a latched portion provided in an outer circumference of the second cam so that rotation of the second cam is restricted, while a biasing unit for biasing the vibration switching member to the forward position is provided; and in that the link plate is further adapted to move forward or backward, through manipulation of the switching operation member, to a first position in which the vibration switching member is allowed to move to the forward position or a second position in which the vibration switching member moves to the backward position. a final output shaft that protrudes forward of a housing accommodating a motor and to which rotation is transmitted from the motor; and a vibration mechanism that is adapted to provide vibration in an axial direction to the final output shaft, the vibration mechanism including a first cam secured integrally to the final output shaft, a second cam that interlocks with a rear of the first cam and is fitted to an exterior of the final output shaft so as to be rotatable, and a vibration switching member that is provided in a rear of the second cam to be movable forward or backward between a forward position in which the vibration switching member is latched onto the second cam so as to restrict rotation and a backward position in which the vibration switching member is apart from the second cam, wherein the vibration switching member is adapted to be moved forward or backward through manipulation of a switching operation member provided to the housing, wherein the vibration switching member is a ring body; and a link plate that is provided between the switching operation member and the vibration switching member, a front end of the link plate latching to a front surface of the vibration switching member from an outer circumference side and a rear end of the link plate engaging with the switching operation member, the electric power tool characterized in that the ring body, in the forward position, is fitted to an exterior of the second cam to cause a latching portion provided in its inner circumference to latch onto a latched portion provided in an outer circumference of the second cam so that rotation of the second cam is restricted, while a biasing unit for biasing the vibration switching member to the forward position is provided; and in that the link plate is further adapted to move forward or backward, through manipulation of the switching operation member, to a first position in which the vibration switching member is allowed to move to the forward position or a second position in which the vibration switching member moves to the backward position.