A drive device for a movable furniture part, in particular for a drawer, comprising: - a carrier, - an ejection device for ejecting the movable furniture part from a closed position into an open position, the ejection device being movable relative to the carrier, wherein the ejection device can be unlocked by an overpressing movement of the movable furniture part from a locking position into an overpressing position situated beyond the closed position, and - a locking device for locking the ejection device in a locking position, wherein the locking device comprises a locking pin arranged on the ejection device and a guide track - preferably at least partly formed in the carrier - for the locking pin, wherein in the locking position the locking pin is locked in a latch recess of the guide track, wherein the latch recess is at least partly formed by a locking element which is movable relative to the carrier, wherein in the locking position the locking pin is held on the locking element, wherein the locking element is supported in a linearly movable manner on the carrier, wherein the locking element is - starting from its position when being in the locking position - linearly movable contrary to that direction in which the locking pin is moved during the overpressing movement, wherein - the ejection device comprises an ejection slider being movable relative to the carrier and an ejection force storage member, preferably formed as a tension spring, wherein the ejection force storage member is attached to the carrier by means of a first force storage member base and to the ejection slider by means a second force storage member base, wherein the ejection slider is linearly movable in an ejection track provided in the carrier and wherein the ejection slider comprises a slider base and a control lever being pivotably supported on the slider base, wherein the locking pin of the locking device is arranged on the control lever of the ejection device, - wherein the locking element is force-actuated by a force storage member, wherein by a movement of the movable furniture part in closing direction the control lever is released from the latch recess along with the locking pin arranged thereon, whereby the locking pin abuts a surface of the locking element, wherein for the movement of the locking pin into this position an unlocking slant and/or the swiveling movement of the control lever is used, whereby the locking pin abuts the locking element after the unlocking and the locking element is moveable by the locking pin against the force of the force storage member in the direction of the ejection section of the guide track. - a carrier, - an ejection device for ejecting the movable furniture part from a closed position into an open position, the ejection device being movable relative to the carrier, wherein the ejection device can be unlocked by an overpressing movement of the movable furniture part from a locking position into an overpressing position situated beyond the closed position, and - a locking device for locking the ejection device in a locking position, wherein the locking device comprises a locking pin arranged on the ejection device and a guide track - preferably at least partly formed in the carrier - for the locking pin, wherein in the locking position the locking pin is locked in a latch recess of the guide track, wherein the latch recess is at least partly formed by a locking element which is movable relative to the carrier, wherein in the locking position the locking pin is held on the locking element, wherein the locking element is supported in a linearly movable manner on the carrier, wherein the locking element is - starting from its position when being in the locking position - linearly movable contrary to that direction in which the locking pin is moved during the overpressing movement, wherein - the ejection device comprises an ejection slider being movable relative to the carrier and an ejection force storage member, preferably formed as a tension spring, wherein the ejection force storage member is attached to the carrier by means of a first force storage member base and to the ejection slider by means a second force storage member base, wherein the ejection slider is linearly movable in an ejection track provided in the carrier and wherein the ejection slider comprises a slider base and a control lever being pivotably supported on the slider base, wherein the locking pin of the locking device is arranged on the control lever of the ejection device, - wherein the locking element is force-actuated by a force storage member, wherein by a movement of the movable furniture part in closing direction the control lever is released from the latch recess along with the locking pin arranged thereon, whereby the locking pin abuts a surface of the locking element, wherein for the movement of the locking pin into this position an unlocking slant and/or the swiveling movement of the control lever is used, whereby the locking pin abuts the locking element after the unlocking and the locking element is moveable by the locking pin against the force of the force storage member in the direction of the ejection section of the guide track.