The invention relates to a lever tap, comprising a stationary body (1), as well as a lever (6) pivotable relative to an articulation (13) and rotatable about its axis (14) and provided with a handle (8) for adjusting a flow passing through the tap. This type of tap may constitute a water tap for wash basin or a shower, whereby the received water is adjustable as to its volume and temperature. An object of the invention is to provide protection for an adjustment mechanism (5) internal of the body (1) from inbound water and detergents. The body (1) may have its end provided with a protective cap (15) enclosing the lever (6) and including a spherically curved surface, whereby, according to the invention, the lever is provided with a co-movable packing (17) having its annular collar adapted to trace along the curved surface of the protective cap for sealing a clearance between the body end and the lever. Preferably, both the body protecting cap (15) and the packing (17) deposited on the lever (6) are designed for a curvature complementary to each other and in a continuous sealing contact with each other.