A hammer drill comprising: an intermediate shaft provided in a housing between a motor and a tool holder, to which a bit is mountable, to receive rotation from the motor; an impact transfer member and a rotation transfer member each rotatably provided on the intermediate shaft, the impact transfer member being configured to cause an impact mechanism portion (25, 28, 29) provided on the tool holder to operate, and the rotation transfer member being configured to rotate the tool holder; a first clutch and a second clutch provided between the impact transfer member and the rotation transfer member so as to be rotatable together with the intermediate shaft and slidable in an axial direction of the intermediate shaft, the first clutch being releasably engageable with the impact transfer member, and the second clutch being releasably engageable with the rotation transfer member; and an elastic element that urges the first clutch and the second clutch in directions away from each other, wherein: one of a slide position at which only the first clutch engages with the impact transfer member, a slide position at which the first clutch engages with the impact transfer member and the second clutch engages with the rotation transfer member, and a slide position at which only the second clutch engages with the rotation transfer member is selectable by an operation of sliding the first clutch and the second clutch performed from outside the housing; wherein the elastic element is held between a first clutch operation member that engages with the first clutch to be slidable in the axial direction of the intermediate shaft and a second clutch operation member that engages with the second clutch to be slidable in the axial direction of the intermediate shaft; the hammer drill being characterised in that at least one of the first and second clutch operation members (33, 34) is slidably guided by the housing or the intermediate shaft. an intermediate shaft provided in a housing between a motor and a tool holder, to which a bit is mountable, to receive rotation from the motor; an impact transfer member and a rotation transfer member each rotatably provided on the intermediate shaft, the impact transfer member being configured to cause an impact mechanism portion (25, 28, 29) provided on the tool holder to operate, and the rotation transfer member being configured to rotate the tool holder; a first clutch and a second clutch provided between the impact transfer member and the rotation transfer member so as to be rotatable together with the intermediate shaft and slidable in an axial direction of the intermediate shaft, the first clutch being releasably engageable with the impact transfer member, and the second clutch being releasably engageable with the rotation transfer member; and an elastic element that urges the first clutch and the second clutch in directions away from each other, wherein: one of a slide position at which only the first clutch engages with the impact transfer member, a slide position at which the first clutch engages with the impact transfer member and the second clutch engages with the rotation transfer member, and a slide position at which only the second clutch engages with the rotation transfer member is selectable by an operation of sliding the first clutch and the second clutch performed from outside the housing; wherein the elastic element is held between a first clutch operation member that engages with the first clutch to be slidable in the axial direction of the intermediate shaft and a second clutch operation member that engages with the second clutch to be slidable in the axial direction of the intermediate shaft; the hammer drill being characterised in that at least one of the first and second clutch operation members (33, 34) is slidably guided by the housing or the intermediate shaft. one of a slide position at which only the first clutch engages with the impact transfer member, a slide position at which the first clutch engages with the impact transfer member and the second clutch engages with the rotation transfer member, and a slide position at which only the second clutch engages with the rotation transfer member is selectable by an operation of sliding the first clutch and the second clutch performed from outside the housing; wherein the elastic element is held between a first clutch operation member that engages with the first clutch to be slidable in the axial direction of the intermediate shaft and a second clutch operation member that engages with the second clutch to be slidable in the axial direction of the intermediate shaft; the hammer drill being characterised in that at least one of the first and second clutch operation members (33, 34) is slidably guided by the housing or the intermediate shaft.