Blade or vane for a compressor comprising: - a main body (15; 25) provided with a base face (16; 26), with a top face (17; 27), opposite with respect to the base face (16; 26), and with an outer face (18; 28), which extends between the base face (16; 26) and the top face (17; 27) and defines the airfoil profile of the blade or vane (7; 10; 70; 700); the main body (15; 25) being shaped so as to define along the outer face (18; 28) a leading edge, a trailing edge, a pressure side and a suction side; - one appendix and one further appendix arranged in the proximity of the trailing edge; wherein the blade is arranged, in use, along a radial direction with respect to the extension axis of the compressor; the main body (15; 25) having a span, which is the radial height, and a chord, which is the axial length; the appendix and the further appendix presenting a front face, which, in use, first meets the working fluid air flow, a rear face, which is arranged downstream the front face, and an intermediate face comprised between the rear face and the front face; wherein the front face is arranged so that the tangent in at least one point of the front face intersects a camber line forming, on a plane orthogonal to the spanwise direction, a first downstream angle (α) greater than 10°, preferably greater than 30°, and wherein the rear face is arranged so that the tangent in at least one point of the rear face intersects the camber line forming, on a plane orthogonal to the spanwise direction, a second downstream angle (β) greater than 30°, preferably greater than 50°; the appendix and the further appendix extending in spanwise direction along at least one respective portion of the trailing edge; the appendix being arranged in the proximity of the top face (17; 27) and the further appendix being arranged in the proximity of the base face (16; 26); the appendix and the further appendix tapering in spanwise direction towards the mid-span section of the main body (15; 25) so as to define one central section along the span of the trailing edge which is not provided with appendixes. - a main body (15; 25) provided with a base face (16; 26), with a top face (17; 27), opposite with respect to the base face (16; 26), and with an outer face (18; 28), which extends between the base face (16; 26) and the top face (17; 27) and defines the airfoil profile of the blade or vane (7; 10; 70; 700); the main body (15; 25) being shaped so as to define along the outer face (18; 28) a leading edge, a trailing edge, a pressure side and a suction side; - one appendix and one further appendix arranged in the proximity of the trailing edge; wherein the blade is arranged, in use, along a radial direction with respect to the extension axis of the compressor; the main body (15; 25) having a span, which is the radial height, and a chord, which is the axial length; the appendix and the further appendix presenting a front face, which, in use, first meets the working fluid air flow, a rear face, which is arranged downstream the front face, and an intermediate face comprised between the rear face and the front face; wherein the front face is arranged so that the tangent in at least one point of the front face intersects a camber line forming, on a plane orthogonal to the spanwise direction, a first downstream angle (α) greater than 10°, preferably greater than 30°, and wherein the rear face is arranged so that the tangent in at least one point of the rear face intersects the camber line forming, on a plane orthogonal to the spanwise direction, a second downstream angle (β) greater than 30°, preferably greater than 50°; the appendix and the further appendix extending in spanwise direction along at least one respective portion of the trailing edge; the appendix being arranged in the proximity of the top face (17; 27) and the further appendix being arranged in the proximity of the base face (16; 26); the appendix and the further appendix tapering in spanwise direction towards the mid-span section of the main body (15; 25) so as to define one central section along the span of the trailing edge which is not provided with appendixes.