A capsule (1) for the preparation of infused or soluble beverages comprises a cup (2) suitable to contain the substance (11) to be infused or dissolved, and provided with a bottom (3) with an opening (31) for the outflow of the infused beverage. The base (33) is provided with a plurality of reliefs (310, 320, 330, 340, 350, 360) having an upper surface devoid of cutting or puncture elements. The capsule (1) comprises a disc (5) suitable to seal the capsule (1) underneath, partially fixed to the base (33), in a releasable manner so as to be at least partially detached as a result of the increase of pressure inside the capsule (1). The opening of the capsule (1) for the release of the infused beverage occurs as a result of the deformation of the disc (5) by the pressure exerted by the fluid inside the capsule (1).