Abstract: In an umbrella, particularly a standing umbrella, sunshade, garden umbrella or similar, with a frame, a roof structure and a canopy, where the roof rods (5) are linked to a pole element (2) bearing a cap (3) and moveable in a telescopic manner relative to the vertical pipe (1), and a slide (4), on which stretchers (6) linked to the roof rods (5) act flexibly, is moveable along the vertical pipe (1), the cap (3) and the slide (4) moving in opposite directions during opening and closing of the umbrella, and with at least one additional stretcher (8) arranged flexibly above the slide (4) between the umbrella pipe (1) and a roof rod (5), the slide (4) being fitted with a locking device (12) with which it can be locked in its upper position and the canopy can be tensioned, it is envisaged that the locking device (12) works in conjunction with a retaining device (13) located on the cap (3) or the moveable pole element (2) to enable simple manual opening of the umbrella and stretching of the canopy, particularly for