An impact tool, which performs a hammering operation by driving a detachable tool accessory at least in an axial direction of the tool accessory, comprising: a motor, a driving mechanism that is driven by the motor and drives the tool accessory in the axial direction of the tool accessory, a single body housing having a motor housing region for housing the motor and a driving mechanism housing region for housing the driving mechanism, and a biasing member that is disposed between the driving mechanism and the body housing, wherein the motor is fixedly held in the motor housing region by a motor holding member, the driving mechanism is held in the driving mechanism housing region by a driving mechanism holding member so as to be movable with respect to the body housing, the driving mechanism moves with respect to the body housing under a biasing force of the biasing member, so that transmission of vibration to the body housing is reduced, the driving mechanism has a swinging member (123, 125) that is driven by the motor and caused to swing in the axial direction of the tool accessory, and a striking mechanism that drives the tool accessory in the axial direction by swinging motion of the swinging member (123, 125) and performs the hammering operation, the body housing houses an intermediate shaft that is rotationally driven by the motor to drive the swinging member (123, 125), arranged in parallel to the axial direction of the tool accessory, the swinging member (123, 125) is held so as to be movable in the axial direction of the tool accessory with respect to the intermediate shaft, the intermediate shaft guides the swinging member (123, 125) such that the swinging member (123, 125) moves in the axial direction of the tool accessory with respect to the body housing, the intermediate shaft is supported so as not to be movable in the axial direction of the tool accessory with respect to the body housing, characterised in that the driving mechanism has a holding member (130, 131, 132) which holds the swinging member (123, 125) while being spaced apart from the intermediate shaft in a radial direction of the intermediate shaft and which can move in the axial direction of the tool accessory together with the swinging member (123, 125) with respect to the body housing, and in that the impact tool further has a rotation transmitting member that rotates together with the intermediate shaft and can come in and out of contact with the swinging member (123, 125) by sliding in the axial direction of the tool accessory with respect to the intermediate shaft, wherein the rotation transmitting member comes in contact with the swinging member (123, 125) to drive the swinging member (123, 125) and transmits rotation of the intermediate shaft to the swinging member (123, 125). a motor, a driving mechanism that is driven by the motor and drives the tool accessory in the axial direction of the tool accessory, a single body housing having a motor housing region for housing the motor and a driving mechanism housing region for housing the driving mechanism, and a biasing member that is disposed between the driving mechanism and the body housing, wherein the motor is fixedly held in the motor housing region by a motor holding member, the driving mechanism is held in the driving mechanism housing region by a driving mechanism holding member so as to be movable with respect to the body housing, the driving mechanism moves with respect to the body housing under a biasing force of the biasing member, so that transmission of vibration to the body housing is reduced, the driving mechanism has a swinging member (123, 125) that is driven by the motor and caused to swing in the axial direction of the tool accessory, and a striking mechanism that drives the tool accessory in the axial direction by swinging motion of the swinging member (123, 125) and performs the hammering operation, the body housing houses an intermediate shaft that is rotationally driven by the motor to drive the swinging member (123, 125), arranged in parallel to the axial direction of the tool accessory, the swinging member (123, 125) is held so as to be movable in the axial direction of the tool accessory with respect to the intermediate shaft, the intermediate shaft guides the swinging member (123, 125) such that the swinging member (123, 125) moves in the axial direction of the tool accessory with respect to the body housing, the intermediate shaft is supported so as not to be movable in the axial direction of the tool accessory with respect to the body housing, characterised in that the driving mechanism has a holding member (130, 131, 132) which holds the swinging member (123, 125) while being spaced apart from the intermediate shaft in a radial direction of the intermediate shaft and which can move in the axial direction of the tool accessory together with the swinging member (123, 125) with respect to the body housing, and in that the impact tool further has a rotation transmitting member that rotates together with the intermediate shaft and can come in and out of contact with the swinging member (123, 125) by sliding in the axial direction of the tool accessory with respect to the intermediate shaft, wherein the rotation transmitting member comes in contact with the swinging member (123, 125) to drive the swinging member (123, 125) and transmits rotation of the intermediate shaft to the swinging member (123, 125).