A rollator comprises a main frame (1), wheels (2), and height adjustable handles (3). According to the present invention each handle (3) is provided with a height adjusting mechanism in the form of a movable ball (4) lockable in one of a plurality of corresponding locking holes (5) formed in the handle (3), a displaceable and spring-biased guide pin (6) having a recessed pressure surface (7) for the ball, and a pivotal rocker (8) displacing the guide pin (9) as to disengage the ball (4) during height adjustments.
