Device (10) for supplying a fluid comprising: a housing (12) defining an interior space (22) and having a lower surface (54) configured to come into contact with a patient, the lower surface defining a needle opening (56)； a reservoir (26) disposed within the interior space (22) of the housing (12) to contain a fluid therein； a needle holder (30) disposed inside the housing (12)； an injection needle (28) supported by the needle holder (30) and defining an opening in fluid communication with the reservoir (26)； wherein the injection needle (28) can pass from an initial position in which the injection needle is disposed inside the housing (12), to a position of use in which the injection needle (28) it extends through the needle opening (56), and a substantially protected position in which the injection needle (28) is disposed inside the housing (12) and the needle opening is blocked by a portion (58) of the housing； characterized in that: the device further comprises a pad (170) disposed inside the housing (12), wherein the injection needle (28) is driven inside the pad (170) and the needle opening Injection (28) is blocked by the pad (170) when the injection needle (28) is in the protected position.Dispositivo (10) para suministrar un fluido que comprende: una carcasa (12) que define un espacio interior (22) y que tiene una superficie inferior (54) configurada para entrar en contacto con un paciente, definiendo la superficie inferior una abertura de aguja (56)； un depósito (26) dispuesto dentro del espacio interior (22) de la carcasa (12) para contener un fluido en su interior； un porta-agujas (30) dispuesto en el interior de la carcasa (12)； una aguja de inyección (28) soportada por el porta-agujas (30) y que define una abertura en comunicación fluida con el depósito (26)； en el que la aguja de inyección (28) puede pasar desde una posición inicial en la que la aguja de inyección está dispuesta en el interior de la carcasa (12), a una posición de utilización en la q
