A microneedle applicator for applying a fluid product on the skin and for causing it penetrate into the skin, the applicator defining a longitudinal axis X and comprising: - an application face (PO) provided with at least a fluid product outlet (O) and a plurality of microneedles (N), - a motor (M1) for causing the microneedles (N) to vibrate, - a fluid product reservoir (R1; R2; R3; R4; R5; R6; R7) connected to the fluid product outlet (O), - a manual actuating member (R10; R20; R30; R40; R50; R60; R70) which acts directly on the volume of the reservoir for conveying the fluid product from the fluid product reservoir (R1; R2; R3; R4; R5; R6; R7) to the fluid product outlet (O), the user taking action by means of a finger on the manual actuating member (R10; R20; R30; R40; R50; R60; R70), characterised in that it comprises two distinct modules (M, C1; C2; C3, C5; C6; C7) removably axially connected to one another, namely: - a first module (M) housing the motor (M1) and accessories for operating the motor (M), and - a second module (C1; C2; C3; C4; C5; C6; C7) housing the fluid product reservoir (R1; R2; R3; R4; R5; R6; R7) and forming the application face (PO) and the manual actuating member (R10; R20; R30; R40; R50; R60; R70), the manual actuating member (R10; R20; R30; R40; R50; R60; R70) being manually accessible and manipulable, when the two modules (M, C1; C2; C3; C4; C5; C6; C7) are connected to each other. - an application face (PO) provided with at least a fluid product outlet (O) and a plurality of microneedles (N), - a motor (M1) for causing the microneedles (N) to vibrate, - a fluid product reservoir (R1; R2; R3; R4; R5; R6; R7) connected to the fluid product outlet (O), - a manual actuating member (R10; R20; R30; R40; R50; R60; R70) which acts directly on the volume of the reservoir for conveying the fluid product from the fluid product reservoir (R1; R2; R3; R4; R5; R6; R7) to the fluid product outlet (O), the user taking action by means of a finger on the manual actuating member (R10; R20; R30; R40; R50; R60; R70), characterised in that it comprises two distinct modules (M, C1; C2; C3, C5; C6; C7) removably axially connected to one another, namely: - a first module (M) housing the motor (M1) and accessories for operating the motor (M), and - a second module (C1; C2; C3; C4; C5; C6; C7) housing the fluid product reservoir (R1; R2; R3; R4; R5; R6; R7) and forming the application face (PO) and the manual actuating member (R10; R20; R30; R40; R50; R60; R70), the manual actuating member (R10; R20; R30; R40; R50; R60; R70) being manually accessible and manipulable, when the two modules (M, C1; C2; C3; C4; C5; C6; C7) are connected to each other. - a first module (M) housing the motor (M1) and accessories for operating the motor (M), and - a second module (C1; C2; C3; C4; C5; C6; C7) housing the fluid product reservoir (R1; R2; R3; R4; R5; R6; R7) and forming the application face (PO) and the manual actuating member (R10; R20; R30; R40; R50; R60; R70), the manual actuating member (R10; R20; R30; R40; R50; R60; R70) being manually accessible and manipulable, when the two modules (M, C1; C2; C3; C4; C5; C6; C7) are connected to each other. <EOS>