Abstract: Microneedle applicator having an application face (C11) provided with a fluid product outlet (C110) and with several microneedles (C111), a motor (M1) for making the microneedles (C111) vibrate, a reservoir (C13) connected to the fluid product outlet (C110), an actuation member (I11) for conveying the fluid product from the reservoir (C13) to the outlet (C110), and three distinct modules (M, C1, I1) axially connected to one another, namely, a motor module (M) housing the motor (M1), a cartridge module (C1) housing the reservoir (C13) and forming the application face (C11), and an intermediate module (I1) connected to the motor module (M) and to the cartridge module (C1). The intermediate module (I1; I2; I3) has the actuation member (I11) and transmission mechanism (I15) for transmitting the vibrations generated by the motor (M1) to the microneedles (C111).