The invention relates to a micro-blower (1) comprising an electric motor (2) with a rotary shaft (3) carrying a finned wheel (4), said electric motor (2) being included in a peripheral shroud (5), said finned wheel (4) being arranged between a lower volute (6) and an upper volute (7), the lower volute (6) comprising a central passage (8) encircling the peripheral surface (9) of the cowling (5) . The cowling (5) of the engine comprises an upper peripheral rim (10) projecting radially away from the outer peripheral surface (9) of the cowling (5). The central passage (8) of the lower volute (6) is lined internally by an annular shoulder (11), an annular seal (14) being arranged on said annular shoulder (11). The lower volute (6) further comprises a plurality of internal stops (12) carried by the inner surface (13) of the lower volute (6). The upper peripheral rim (10) of the cowling (5) of the motor being positioned between the annular seal (14) and the internal stops (12) of the lower volute (6), said internal stops (12) pressing against said upper peripheral flange (10) of the motor casing (5) so as to compress the annular seal (14) between said upper peripheral flange (10) of the casing (5) and the annular shoulder (11) of the lower volute (6).L' invention porte sur une micro-soufflante (1) comprenant un moteur électrique (2) à arbre rotatif (3) portant une roue à ailettes (4), ledit moteur électrique (2) étant compris dans un capotage (5) périphérique, ladite roue à ailettes (4) étant agencée entre une volute inférieure (6) et une volute supérieure (7), la volute inférieure (6) comprenant un passage central (8) venant ceinturer la surface périphérique (9) du capotage (5). Le capotage (5) du moteur comprend un rebord périphérique supérieur (10) se projetant radialement en éloignement par rapport à la surface périphérique externe (9) du capotage (5). Le passage central (8) de la volute inférieure (6) est bordé intérieurement par un épaulement annulaire (11), un joint
