Drive mechanism (1) for a movable furniture part (2), in particular a drawer, having a first and a second lockable pushing-out mechanism (3a, 3b) and a synchronizing mechanism (4) for synchronizing the two pushing-out mechanisms (3a, 3b), wherein the synchronizing mechanism (4) has a synchronizing rod (5) and a first and a second synchronizing element (6a, 6b), which can be connected to the synchronizing rod (5), and wherein relative movement takes place between the synchronizing elements (6a, 6b) and the pushing-out mechanisms (3a, 3b) during synchronizing operation, wherein, in an active synchronizing mode (S1), during synchronizing operation, movement is transmitted from the first pushing-out mechanism (3a), via the first synchronizing element (6a), the synchronizing rod (5) and the second synchronizing element (6b), to the second pushing-out mechanism (3b) and, in an inactive synchronizing mode (S0), the synchronizing rod (5) is removed and the synchronizing elements (6a, 6b) each remain in contact with one of the pushing-out mechanisms (3a, 3b).