Improved adjustable holster securement device

An adjustable holster securement device comprising a loop attachment (1) for securing the holster to the belt of a user, a connection plate (3) to which a holster can be attached, an articulated joint (2) that connects the loop attachment to the connection plate in an articulated way. The articulated joint comprises two substantially U-shaped members (6; 7; 8a,b; 9a,b) pivotably engaged in respective seatings (4, 5) at opposite sides. The two pairs of seatings are coaxial and parallel and integral with, respectively, the loop attachment and the connection plate. Tie-rod means (10, 11) are also provided acting parallel to said seatings to connect the substantially U-shaped members to each other and means (6a,b; 7a,b) for locking the articulation arranged between the substantially U-shaped members and the seating and operable by the tie-rod means to control the locking and the release of the articulation.