A machine tool, in particular hand guided machine tool, which has a tool receiving device movable around a driving axis, in particular in an oscillating manner, wherein the tool receiving device is adapted to hold a tool device on the machine tool such that the driving axis and a tool axis of rotation are substantially coincident, wherein the tool receiving device has at least one clamping device, at least one holding device and at least one locking device, wherein the holding device can be moved from at least a first open position into at least a second closed position, wherein a clamping force can be applied onto the holding device by the clamping device, preferably in the closing direction from the first open position toward the second closed position, wherein the locking device can be moved between at least a first locking position and at least a second unlocking position, wherein the locking device is adapted to cooperate with the holding device, wherein a movement of the holding device can be blocked in at least one locking position by the locking device, characterised in that a locking force effect can be applied from the clamping device on the locking device in the locking position; that an unlocking force effect can be applied from the tool device on the locking device; that the unlocking force effect is opposite to the locking force effect; that the clamping device comprises a moving element; that the moving element can be moved along a first direction of movement, wherein preferably the direction of movement is at least partially rotary and / or translational; that the locking device has a contact surface; and that the contact surface is adapted to contact the locking device with the moving element; wherein the locking device is designed such that the locking device can be moved from one of the locking positions into one of the unlocking positions by a force, which has been applied on the locking device directly or indirectly by the tool device. wherein the tool receiving device is adapted to hold a tool device on the machine tool such that the driving axis and a tool axis of rotation are substantially coincident, wherein the tool receiving device has at least one clamping device, at least one holding device and at least one locking device, wherein the holding device can be moved from at least a first open position into at least a second closed position, wherein a clamping force can be applied onto the holding device by the clamping device, preferably in the closing direction from the first open position toward the second closed position, wherein the locking device can be moved between at least a first locking position and at least a second unlocking position, wherein the locking device is adapted to cooperate with the holding device, wherein a movement of the holding device can be blocked in at least one locking position by the locking device, characterised in that a locking force effect can be applied from the clamping device on the locking device in the locking position; that an unlocking force effect can be applied from the tool device on the locking device; that the unlocking force effect is opposite to the locking force effect; that the clamping device comprises a moving element; that the moving element can be moved along a first direction of movement, wherein preferably the direction of movement is at least partially rotary and / or translational; that the locking device has a contact surface; and that the contact surface is adapted to contact the locking device with the moving element; wherein the locking device is designed such that the locking device can be moved from one of the locking positions into one of the unlocking positions by a force, which has been applied on the locking device directly or indirectly by the tool device.