The present invention refers to an angular inclination mechanism of a sunshade (1) comprising an outer container (5) which substantially develops in a longitudinal direction along an axis X-X between two opposite heads (6) and which defines an internal cavity (4) for housing a pipe (3) rotatably constrained to the ends and adapted to wind a canvas (2) which is moved by at least one articulated arm (8), the rotation mechanism (10) comprising transmission means (12) coupled to and actuated by an actuation group (13), said transmission means (12) being integral with and externally associated to the outer container (5) and being arranged in an intermediate position between said heads (6), said actuation group (13) comprising a pin (14) rotatably coupled to said transmission means (12) and adapted to put in rotation said outer container (5) around axis X-X by an axial rotation of said pin (14).