Supporting element (10; 110; 210; 310; 410; 510; 610) for synthetic turfs comprising a main body (11; 311) shaped with a corrugated profile comprising crests (14; 314) and valleys (16; 316), said supporting element being characterized by - at least one opened beak (30; 330) comprising an arc-of-circle opening and which is disposed on a first side (20; 320) of the main body (11; 311), and - a bar (32; 332) which has a cross-section homologous to the cross-section of the opening and which is disposed on a second side (22; 322) of the main body (11; 311), said beak (30; 330) being adapted to be removably coupled with the bar of another identical supporting element and said bar (32; 332) being adapted to be removably coupled with the beak of another identical supporting element, wherein the at least one beak (30; 330) develops from a valley (16; 316) upward and the bar (32; 332) develops from a valley (16; 316) upward, the sum of the height of the beak (30; 330) from the valley (16; 316) and the height of the bar (32; 332) from the valley (16; 316) being equal to the height from a valley (16; 316) to a crest (14; 314), so that the connection of the at least one beak (30; 330) of a the supporting element with the bar (32; 332) of another identical supporting element which is oriented upsidedown in comparison with the supporting element allows to maintain the development of the corrugated profile of the main body (11; 311); wherein grooves (34; 334) are provided next to the bar (32; 332) which allow the passing of the beak (30; 330) to enable the at least one beak (30; 330) to rotate around the bar when the bar (32; 332) of the supporting element and the beak (30; 330) of another identical supporting element are coupled to each other. - at least one opened beak (30; 330) comprising an arc-of-circle opening and which is disposed on a first side (20; 320) of the main body (11; 311), and - a bar (32; 332) which has a cross-section homologous to the cross-section of the opening and which is disposed on a second side (22; 322) of the main body (11; 311), said beak (30; 330) being adapted to be removably coupled with the bar of another identical supporting element and said bar (32; 332) being adapted to be removably coupled with the beak of another identical supporting element, wherein the at least one beak (30; 330) develops from a valley (16; 316) upward and the bar (32; 332) develops from a valley (16; 316) upward, the sum of the height of the beak (30; 330) from the valley (16; 316) and the height of the bar (32; 332) from the valley (16; 316) being equal to the height from a valley (16; 316) to a crest (14; 314), so that the connection of the at least one beak (30; 330) of a the supporting element with the bar (32; 332) of another identical supporting element which is oriented upsidedown in comparison with the supporting element allows to maintain the development of the corrugated profile of the main body (11; 311); wherein grooves (34; 334) are provided next to the bar (32; 332) which allow the passing of the beak (30; 330) to enable the at least one beak (30; 330) to rotate around the bar when the bar (32; 332) of the supporting element and the beak (30; 330) of another identical supporting element are coupled to each other.