A delivering tap (1) is described for delivering liquids from a container, comprising a main body (3) with a connecting element (3.20) having fitting means (3.1) with the container, and a supporting body (3.21) adapted to be closed by a plug (2) associated with a cam seal (4), the supporting body (3.21) comprising a first opening (3.2) for exiting liquid, and sealing means (3.3) associated with the first opening (3.2) and with the plug (2), the supporting body (3.21) comprising external guiding means (3.7) obtained on its external surface and useful to guide the plug (2) in the opening and closing steps of the plug cooperating with a cam profile, the plug (2) comprising a central cylinder (2.3) having lower sealing means (2.1) obtained at its lower end and adapted to be coupled with the sealing means (3.3) of the main body (3) to determine the seal of the plug next to the first opening (3.2), said cam profile being made of two parts, the first part on the plug (2) and the second part (4.2) on the cam seal (4).