Abstract: The infusion device comprises an infusion chamber with a first portion (5) and a second portion (3), movable with respect to each other, and one of which defining a seat (25) for the capsules (C). In the seat there is disposed at least one perforator (27) to perforate the capsule. A first duct (47) feeds an infusion fluid into the chamber and a second duct (29) allows delivery of the food product from the infusion chamber. In said seat (25) there is housed a centering member (40) of the capsules (C), elastically movable in an axial direction and provided with a guide and centering surface (40A) of the capsules, facing towards the second of said portions of the infusion chamber.