Receiving element for a screw-type shower tray valve, for insertion into a continuous outlet opening of a shower floor panel, which has a first plane or concave flat side (2; 3) and a second flat side (3; 2) directed away from the first one, comprising: - an annular body which can be inserted from the first flat side (2; 3) into the outlet opening of the shower floor panel and which bears with its bearing collar on the first flat side (2; 3) of the shower floor panel, wherein the bearing collar merges into an inclined wall of the annular body and wherein the annular body has at least one circumferential rib (11, 12, 26), which is arranged vertically or at a slight inclination to the bearing collar of the annular body, - and a support flange which can be inserted from the second flat side (3; 2) of the shower floor panel into the outlet opening thereof and which bears with its bearing collar on the second flat side (3; 2) of the shower floor panel, and wherein the support flange likewise has at least one circumferential rib (21, 22, 28) which is directed substantially perpendicular to the bearing collar of the support flange, wherein the ribs (11, 12, 26) of the annular body and the ribs (21, 22, 28) of the support flange are directed toward each other in the assembled state, and wherein at least one of the ribs (11, 12, 26) of the annular body at least partially meshes with at least one rib (21, 22, 28) of the support flange in the assembled state, characterized in that - the inclined wall has at least one circumferential rib (11, 12, 26) and a profile and runs out into a cylindrical inner wall, - the ribs (11, 12, 26) of the annular body and the ribs (21, 22, 28) of the support flange, in the assembled state, are connected to each other with a force fit, - at least one rib of the annular body or of the support flange is segmented on its periphery, with the result that when the two parts of the receiving element are pressed together, the segmented rib yields slightly on account of the pressure force exerted by the rib in order to be able to press against an inner face of the outlet opening. - an annular body which can be inserted from the first flat side (2; 3) into the outlet opening of the shower floor panel and which bears with its bearing collar on the first flat side (2; 3) of the shower floor panel, wherein the bearing collar merges into an inclined wall of the annular body and wherein the annular body has at least one circumferential rib (11, 12, 26), which is arranged vertically or at a slight inclination to the bearing collar of the annular body, - and a support flange which can be inserted from the second flat side (3; 2) of the shower floor panel into the outlet opening thereof and which bears with its bearing collar on the second flat side (3; 2) of the shower floor panel, and wherein the support flange likewise has at least one circumferential rib (21, 22, 28) which is directed substantially perpendicular to the bearing collar of the support flange, - the inclined wall has at least one circumferential rib (11, 12, 26) and a profile and runs out into a cylindrical inner wall, - the ribs (11, 12, 26) of the annular body and the ribs (21, 22, 28) of the support flange, in the assembled state, are connected to each other with a force fit, - at least one rib of the annular body or of the support flange is segmented on its periphery,