A stirring device, in particular for a mixer-container, comprising: - a rotatable drive shaft extending along a longitudinal axis; - an agitating element (5a, 5b); and - a sleeve of tubular shape; wherein the drive shaft comprises a rod, the sleeve forming a coupling sleeve receiving the drive shaft therethrough and being directly rotationally coupled to the rod of the drive shaft, characterized by the sleeve being sandwiched in an assembled state between a mounting area (20a; 20b) of the rod and the agitating element (5a; 5b), wherein the agitating element (5a; 5b) comprises: - a hub which has an annular side wall that extends longitudinally around a central axis, the annular side wall delimiting an inner space; and - an impeller assembly comprising a set of generally radially extending blades (6a; 6b), the blades and the hub being indirectly rotationally coupled to the rod of the drive shaft via the sleeve that is engaged in the inner space through an axial insertion opening; and wherein the hub is directly rotationally coupled to the sleeve, one of an inner surface of the annular side wall and an outer surface of the sleeve being a guiding surface provided with a progressive reduction of cross section with increased distance from the axial insertion opening; and wherein the sleeve is provided with a fastening arrangement (30, 30') for fastening the sleeve to the hub, the fastening arrangement (30, 30') comprising one or more abutment members (33, 34, 35) that prevent axial movement between the hub and the sleeve, in a locked configuration in which the one or more abutment members (34, 35) are engaged with complementary abutment means formed on the hub, preferably formed on the annular side wall. - a rotatable drive shaft extending along a longitudinal axis; - an agitating element (5a, 5b); and - a sleeve of tubular shape; wherein the drive shaft comprises a rod, the sleeve forming a coupling sleeve receiving the drive shaft therethrough and being directly rotationally coupled to the rod of the drive shaft, characterized by the sleeve being sandwiched in an assembled state between a mounting area (20a; 20b) of the rod and the agitating element (5a; 5b), wherein the drive shaft comprises a rod, the sleeve forming a coupling sleeve receiving the drive shaft therethrough and being directly rotationally coupled to the rod of the drive shaft, characterized by the sleeve being sandwiched in an assembled state between a mounting area (20a; 20b) of the rod and the agitating element (5a; 5b), - a hub which has an annular side wall that extends longitudinally around a central axis, the annular side wall delimiting an inner space; and - an impeller assembly comprising a set of generally radially extending blades (6a; 6b), the blades and the hub being indirectly rotationally coupled to the rod of the drive shaft via the sleeve that is engaged in the inner space through an axial insertion opening; and wherein the hub is directly rotationally coupled to the sleeve, one of an inner surface of the annular side wall and an outer surface of the sleeve being a guiding surface provided with a progressive reduction of cross section with increased distance from the axial insertion opening; and wherein the sleeve is provided with a fastening arrangement (30, 30') for fastening the sleeve to the hub, the fastening arrangement (30, 30') comprising one or more abutment members (33, 34, 35) that prevent axial movement between the hub and the sleeve, in a locked configuration in which the one or more abutment members (34, 35) are engaged with complementary abutment means formed on the hub, preferably formed on the annular side wall. and wherein the hub is directly rotationally coupled to the sleeve, one of an inner surface of the annular side wall and an outer surface of the sleeve being a guiding surface provided with a progressive reduction of cross section with increased distance from the axial insertion opening; and wherein the sleeve is provided with a fastening arrangement (30, 30') for fastening the sleeve to the hub, the fastening arrangement (30, 30') comprising one or more abutment members (33, 34, 35) that prevent axial movement between the hub and the sleeve, in a locked configuration in which the one or more abutment members (34, 35) are engaged with complementary abutment means formed on the hub, preferably formed on the annular side wall.