A drain device for installation in an opening of a floor plate, preferably a shower floor plate, comprising: - an upper inlet opening through which waste water can enter the drain device, - a cover bounding the upper inlet opening and carried by an extension element, - parts pre-mountable in the floor area and fluidically connectable to a drainpipe, so that waste water passing through the inlet opening can enter the drainpipe, wherein the drain device further comprises an adjusting device with the following components: - a receiver for installation in the base plate with a support and an inner contour which has an inner diameter; - a holder for the extension element, which holder can be inserted into the receiver, wherein the holder has an outer contour, an upper side and a lower side, and wherein the outer contour has an external diameter which is smaller than the internal diameter of the receiver, so that the holder inserted into the receiver is movable in a horizontal direction within a horizontal clearance range in a preassembled state, - a fixing element attachable to the receiver and having an upper side and a lower side, which fixing element allows the holder to be moved in the preassembled state in the vertical direction relative to the fixing element, while leaving a clearance, characterised in that the upper side of the holder has a recess and the fixing element has a projection which can be inserted into the recess and which, in the preassembled state, is arranged within the recess and limits the clearance of the holder with respect to the fixing element in the horizontal direction, so that in the preassembled state of the receiver, holder and fixing element, the holder is freely movable in the receiver within a vertical clearance and a horizontal clearance. - an upper inlet opening through which waste water can enter the drain device, - a cover bounding the upper inlet opening and carried by an extension element, - parts pre-mountable in the floor area and fluidically connectable to a drainpipe, so that waste water passing through the inlet opening can enter the drainpipe, wherein the drain device further comprises an adjusting device with the following components: - a receiver for installation in the base plate with a support and an inner contour which has an inner diameter; - a holder for the extension element, which holder can be inserted into the receiver, wherein the holder has an outer contour, an upper side and a lower side, and wherein the outer contour has an external diameter which is smaller than the internal diameter of the receiver, so that the holder inserted into the receiver is movable in a horizontal direction within a horizontal clearance range in a preassembled state, - a fixing element attachable to the receiver and having an upper side and a lower side, which fixing element allows the holder to be moved in the preassembled state in the vertical direction relative to the fixing element, while leaving a clearance, - a receiver for installation in the base plate with a support and an inner contour which has an inner diameter; - a holder for the extension element, which holder can be inserted into the receiver, wherein the holder has an outer contour, an upper side and a lower side, and wherein the outer contour has an external diameter which is smaller than the internal diameter of the receiver, so that the holder inserted into the receiver is movable in a horizontal direction within a horizontal clearance range in a preassembled state, - a fixing element attachable to the receiver and having an upper side and a lower side, which fixing element allows the holder to be moved in the preassembled state in the vertical direction relative to the fixing element, while leaving a clearance, characterised in that the upper side of the holder has a recess and the fixing element has a projection which can be inserted into the recess and which, in the preassembled state, is arranged within the recess and limits the clearance of the holder with respect to the fixing element in the horizontal direction, so that in the preassembled state of the receiver, holder and fixing element, the holder is freely movable in the receiver within a vertical clearance and a horizontal clearance.