Capsule for beverage-making machines comprising a lid through which a fluid is injected under pressure to a first air chamber, whose bottom comprises orifices through which the fluid injected is applied to a second chamber containing a food product, and the fluid mixes with the food product and the second chamber has a bottom equipped with perforations for the passage of the fluid mixed with the food product to a third chamber to slow down the outflow of the mixture of the fluid with the food product; and next to said third chamber an outlet for the mixture of the fluid with the food product is comprised; the capsule comprises: - a container opened by its top side, which is sealed in an airtight manner with a lid; - a plate (16a, 16b) constituting the bottom of the second chamber which is equipped with the perforations for the passage of the fluid mixed with the food product, which, along with the bottom of the container, defines the third chamber so that, when the increase in the pressure in the upper surface of said plate (16a, 16b) is provoked, the passage of the fluid mixed with the food product to the third chamber is permitted; characterized in that: - the capsule comprises a frusto-conical support that together with the container and with the lid defines the first air chamber said air chamber with a bottom a with the shape of a ring, the surface of the frusto-conical support comprises the orifices for the passage of the fluid to the second chamber; and those orifices are covered by a ring body, which seal said first air chamber, whose width is configured to break simultaneously in the area covering said orifices when the first air chamber acquires a specific pressure previously established by the width of the ring body; - the capsule comprises a micro-membrane that closes the opening of the bottom of the container in an airtight manner, which is configured to break when the pressure of the fluid injected into the third chamber increases, allowing the passage of the fluid mixed with the food product towards the outlet; - the bottom of the container is equipped with a central opening in correspondence with which an extension defining the outlet is comprised, and whose external configuration is adapted to the bowl of the beverage-making machine. - a container opened by its top side, which is sealed in an airtight manner with a lid; - a plate (16a, 16b) constituting the bottom of the second chamber which is equipped with the perforations for the passage of the fluid mixed with the food product, which, along with the bottom of the container, defines the third chamber so that, when the increase in the pressure in the upper surface of said plate (16a, 16b) is provoked, the passage of the fluid mixed with the food product to the third chamber is permitted; characterized in that: - the capsule comprises a frusto-conical support that together with the container and with the lid defines the first air chamber said air chamber with a bottom a with the shape of a ring, the surface of the frusto-conical support comprises the orifices for the passage of the fluid to the second chamber; and those orifices are covered by a ring body, which seal said first air chamber, whose width is configured to break simultaneously in the area covering said orifices when the first air chamber acquires a specific pressure previously established by the width of the ring body; - the capsule comprises a micro-membrane that closes the opening of the bottom of the container in an airtight manner, which is configured to break when the pressure of the fluid injected into the third chamber increases, allowing the passage of the fluid mixed with the food product towards the outlet; - the bottom of the container is equipped with a central opening in correspondence with which an extension defining the outlet is comprised, and whose external configuration is adapted to the bowl of the beverage-making machine.