A phase setter for adjusting the rotational angular position of a cam shaft relative to a crankshaft of a combustion engine, said phase setter comprising: (a) a stator which can be rotary-driven by the crankshaft; (b) a rotor which can be rotary-driven about a rotational axis by the stator and which forms a first setting chamber (K 1) and a second setting chamber (K 2) with the stator, to each of which a pressure fluid can be applied in order to be able to adjust the rotor relative to the stator about the rotational axis; (c) a fastening structure (10; 100) which extends axially through the rotor, in order to connect the rotor and the cam shaft fixedly in terms of torque, and which forms an annular gap with the rotor and, once connected, optionally also with the cam shaft; (d) a first sealing stay, a second sealing stay and a third sealing stay which each extend around the rotational axis and are elastically flexible; (e) a first fluid port (A, P, 7a) which feeds into the annular gap, axially between the first sealing stay and the second sealing stay, and through which the pressure fluid can be supplied to the first setting chamber (K 1); (f) a second fluid port (B, T B, 7b) which feeds into the annular gap, axially between the second sealing stay and the third sealing stay, and through which the pressure fluid can be drained from the second setting chamber (K 2); (g) and a sealing sleeve which is fastened to the rotor or to the fastening structure (10; 100) and which forms the sealing stays (51, 52, 53) and connecting stays (56, 57), which connect the sealing stays (51, 52, 53) to each other axially between the sealing stays (51, 52, 53), in one piece, wherein one of the fluid ports (A, P, 7a, B, T B, 7b) is formed in the region of at least one of the connecting stays (56, 57). (a) a stator which can be rotary-driven by the crankshaft; (b) a rotor which can be rotary-driven about a rotational axis by the stator and which forms a first setting chamber (K 1) and a second setting chamber (K 2) with the stator, to each of which a pressure fluid can be applied in order to be able to adjust the rotor relative to the stator about the rotational axis; (c) a fastening structure (10; 100) which extends axially through the rotor, in order to connect the rotor and the cam shaft fixedly in terms of torque, and which forms an annular gap with the rotor and, once connected, optionally also with the cam shaft; (d) a first sealing stay, a second sealing stay and a third sealing stay which each extend around the rotational axis and are elastically flexible; (e) a first fluid port (A, P, 7a) which feeds into the annular gap, axially between the first sealing stay and the second sealing stay, and through which the pressure fluid can be supplied to the first setting chamber (K 1); (f) a second fluid port (B, T B, 7b) which feeds into the annular gap, axially between the second sealing stay and the third sealing stay, and through which the pressure fluid can be drained from the second setting chamber (K 2); (g) and a sealing sleeve which is fastened to the rotor or to the fastening structure (10; 100) and which forms the sealing stays (51, 52, 53) and connecting stays (56, 57), which connect the sealing stays (51, 52, 53) to each other axially between the sealing stays (51, 52, 53), in one piece, wherein one of the fluid ports (A, P, 7a, B, T B, 7b) is formed in the region of at least one of the connecting stays (56, 57).