A coating material atomizer comprising: • a body comprising an inner portion and an outer portion; • an atomizer member for atomizing the coating material, which member is arranged at a downstream end of the body so as to form a spray of coating material (J 1), the atomizer member being centered on a spraying axis (X 1); • outlet channels distributed about the spraying axis (X 1), each outlet channel being provided in the body in such a manner as to eject air (J 42) so as to shape the spray of coating material; • at least one outlet chamber formed between the inner portion and the outer portion, the outlet chamber extending about the spraying axis (X 1), the outlet chamber communicating with the outlet channels; • at least one inlet duct provided in the body, the inlet duct being designed to feed air to the outlet channels; • at least two intermediate chambers (210, 230, 250) juxtaposed along the spraying axis (X 1; X 6), each intermediate chamber (210, 230, 250) being formed between the inner portion and the outer portion, each intermediate chamber (210, 230, 250) extending about the spraying axis (X 1; X 6), at least one inlet duct communicating with the intermediate chamber (210, 230, 250) that is axially furthest from the atomizer member; intermediate channels (221-224, 241-248; 621-622, 641-644) formed between the inner portion and the outer portion, two juxtaposed intermediate chambers (210, 230, 250) being interconnected via a set of intermediate channels (221-224, 241-248; 621-622, 641-644), the intermediate channels (221-224, 241-248; 621-622, 641-644) of the same set being distributed about the spraying axis (X 1; X 6); and outlet ducts extending between the intermediate chamber (210, 230, 250) that is axially closest to the atomizer member and the outlet chamber, the outlet ducts being distributed about the spraying axis (X 1; X 6). said atomizer being characterized in that • it includes between three and eight intermediate chambers (210, 230, 250) juxtaposed along the spraying axis (X1; X6) and • the intermediate channels (221-224, 241-248); 621-622, 641-644) belonging to the same set occupy angular positions about the spraying axis (X 1; X 6) that are offset angularly (D; D 6) about the spraying axis (X 1; X 6) relative to the intermediate channels (221-224, 241-248; 621-622, 641-644) belonging to a juxtaposed set. • a body comprising an inner portion and an outer portion; • an atomizer member for atomizing the coating material, which member is arranged at a downstream end of the body so as to form a spray of coating material (J 1), the atomizer member being centered on a spraying axis (X 1); • outlet channels distributed about the spraying axis (X 1), each outlet channel being provided in the body in such a manner as to eject air (J 42) so as to shape the spray of coating material; • at least one outlet chamber formed between the inner portion and the outer portion, the outlet chamber extending about the spraying axis (X 1), the outlet chamber communicating with the outlet channels; • at least one inlet duct provided in the body, the inlet duct being designed to feed air to the outlet channels; • at least two intermediate chambers (210, 230, 250) juxtaposed along the spraying axis (X 1; X 6), each intermediate chamber (210, 230, 250) being formed between the inner portion and the outer portion, each intermediate chamber (210, 230, 250) extending about the spraying axis (X 1; X 6), at least one inlet duct communicating with the intermediate chamber (210, 230, 250) that is axially furthest from the atomizer member; intermediate channels (221-224, 241-248; 621-622, 641-644) formed between the inner portion and the outer portion, two juxtaposed intermediate chambers (210, 230, 250) being interconnected via a set of intermediate channels (221-224, 241-248; 621-622, 641-644), the intermediate channels (221-224, 241-248; 621-622, 641-644) of the same set being distributed about the spraying axis (X 1; X 6); and outlet ducts extending between the intermediate chamber (210, 230, 250) that is axially closest to the atomizer member and the outlet chamber, the outlet ducts being distributed about the spraying axis (X 1; X 6). • it includes between three and eight intermediate chambers (210, 230, 250) juxtaposed along the spraying axis (X1; X6) and • the intermediate channels (221-224, 241-248); 621-622, 641-644) belonging to the same set occupy angular positions about the spraying axis (X 1; X 6) that are offset angularly (D; D 6) about the spraying axis (X 1; X 6) relative to the intermediate channels (221-224, 241-248; 621-622, 641-644) belonging to a juxtaposed set.