A drive device for a moveable furniture part, comprising - an ejection element for moving the moveable furniture part from a closed position into an open position, - an ejection force storage means which acts with force on the ejection element, and - a locking device for locking the ejection element by way of a locking element in a locking portion, wherein by over-pressing the moveable furniture part from the closed position in the closing direction into an over-pressing position (ÜS) the locking device can be unlocked whereby the moveable furniture part is moveable in the opening direction by the ejection force storage means and the ejection element, wherein the locking device has a guide path for the locking element, wherein the locking element can be held in the locking portion in a latching region of the guide path characterised in that the locking device has a pre-locking portion for the locking element, wherein by pressing the moveable furniture part through upon closing thereof into a through-pressing position behind the closed position in the closing direction the locking element passes from the pre-locking portion into the locking portion by way of a through-pressing evasion portion, wherein a holding element for the locking element is arranged or provided in the pre-locking portion, wherein either - in the pre-locking portion the guide path has a straight contact surface for the locking element, as the holding element, wherein the straight contact surface is oriented in such a way that the force of acting from the ejection force storage means onto the locking element holds the locking element on the straight contact surface and the forces are acting substantially rectangular onto this straight contact surface, or - the holding element is in the form of a moveable damping element, wherein the damping element has a dampedly rotatably mounted gear, wherein at least one tooth of the gear can be contacted in the pre-locking portion by the locking element and is dampedly moveable in the direction of the locking portion. - an ejection element for moving the moveable furniture part from a closed position into an open position, - an ejection force storage means which acts with force on the ejection element, and - a locking device for locking the ejection element by way of a locking element in a locking portion, wherein by over-pressing the moveable furniture part from the closed position in the closing direction into an over-pressing position (ÜS) the locking device can be unlocked whereby the moveable furniture part is moveable in the opening direction by the ejection force storage means and the ejection element, wherein the locking device has a guide path for the locking element, wherein the locking element can be held in the locking portion in a latching region of the guide path - in the pre-locking portion the guide path has a straight contact surface for the locking element, as the holding element, wherein the straight contact surface is oriented in such a way that the force of acting from the ejection force storage means onto the locking element holds the locking element on the straight contact surface and the forces are acting substantially rectangular onto this straight contact surface, or - the holding element is in the form of a moveable damping element, wherein the damping element has a dampedly rotatably mounted gear, wherein at least one tooth of the gear can be contacted in the pre-locking portion by the locking element and is dampedly moveable in the direction of the locking portion.