A sleeve valve for fluid flow between a hydrocarbon reservoir and a well including a fixed outer sleeve with openings and a movable inner sleeve with openings which can be aligned and misaligned with the outer sleeve openings in order to admit or shut off the fluid flow. The outer sleeve opening is provided with a movable sealing element that has a through-going radial opening adapted to rest around the opening in the inner sleeve, and a tension element presses the sealing element against the inner sleeve. A portion of the side face of the sealing element forms a pressure face which under the effect of pressure in a pressure chamber presses the sealing element against the inner sleeve. The pressure chamber is via at least one connection connected to at least one pressure source whereby pressure propagation from the pressure source to the pressure chamber causes the sealing element to be pressed even more against the inner sleeve.
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