Clamping device which can be applied to an object, for example a cloth, foil or plate, by clamping two opposite sides of the object, comprising: - a first clamping part provided with a first clamping surface and a guide surface present opposite and ascending relative to the first clamping surface, and - a second clamping part provided with a second clamping surface that faces the first clamping surface, as well as a sliding part which can slide over the ascending guide surface and thereby changes the distance between the clamping surfaces, - wherein the first clamping part on the side of the ascending guide surface is provided with a first protrusion, - wherein the sliding part is provided with a second protrusion which is on the same side of the first clamping part as the first protrusion, - wherein the protrusions can be moved manually towards each other and away from each other in order to move the clamping surfaces (5, 11) towards each other or away from each other, - wherein the first clamping part is provided with a slot which is present in the ascending guide surface and extends in the ascending direction, - wherein the sliding part is connected via a connecting part to the rest of the second clamping part, and - wherein the connecting part protrudes through the slot and the sliding part being located on both sides of the slot. characterized in that: - the first clamping part is provided with a further slot which is also present in the ascending guide surface and is parallel to said slot, and - the second clamping part is provided with a further sliding part which is connected via a further connecting part protruding through the further slot to the rest of the second clamping part, - wherein the further connecting part protrudes through the further slot and also the further sliding part is located on both sides of the further slot and is provided with a third protrusion. - a first clamping part provided with a first clamping surface and a guide surface present opposite and ascending relative to the first clamping surface, and - a second clamping part provided with a second clamping surface that faces the first clamping surface, as well as a sliding part which can slide over the ascending guide surface and thereby changes the distance between the clamping surfaces, - wherein the first clamping part on the side of the ascending guide surface is provided with a first protrusion, - wherein the sliding part is provided with a second protrusion which is on the same side of the first clamping part as the first protrusion, - wherein the protrusions can be moved manually towards each other and away from each other in order to move the clamping surfaces (5, 11) towards each other or away from each other, - wherein the first clamping part is provided with a slot which is present in the ascending guide surface and extends in the ascending direction, - wherein the sliding part is connected via a connecting part to the rest of the second clamping part, and - wherein the connecting part protrudes through the slot and the sliding part being located on both sides of the slot. - the first clamping part is provided with a further slot which is also present in the ascending guide surface and is parallel to said slot, and - the second clamping part is provided with a further sliding part which is connected via a further connecting part protruding through the further slot to the rest of the second clamping part, - wherein the further connecting part protrudes through the further slot and also the further sliding part is located on both sides of the further slot and is provided with a third protrusion.