A device (D) fixes, to the internal wall of a tire (P), an electronic box (100) for measuring parameters inside the tire, the device (D) associating the box (100) with a flexible receptacle (200) which, being fixed to the internal wall by an adhesion means (300), is preformed so as to accept and hold said box (100), remarkable in that said flexible receptacle (200) forms a compartment (210) equipped with an opening (220), by means of which said box (100) is introduced and which is bordered by an edge (221) extending externally and offering a contact surface (222) for the adhesion means (300) so that, once the receptacle (200) is fixed, said opening (220) is closed by the internal wall on which the receptacle (200) is fixed.