An extension handle (10) for the gardening trimmer (200,300) may comprise a main pole (12), a grip unit (20) disposed at one end of the main pole (12), and an attachment unit (40) disposed at the other end of the main pole (12). The grip unit (20) may be configured to be held by a user, and the attachment unit (40) may be configured to be detachably attached to the gardening trimmer (200,300). The grip unit (20) may comprise an operable member configured to be operated by the user, and the attachment unit (40) may comprise a movable member configured to operate a driving switch (214) of the gardening trimmer (200,300) in conjunction with movement of the operable member (24).
