A dispensing assembly for a machine for the preparation of beverages using capsules that have a body that houses a dose of at least one substance that is able to form a liquid product using a fluid, such as water and/or steam under pressure, the dispensing assembly having: - an infusion chamber that comprises a first part and a second part, at least the first part defining a housing configured for receiving at least partially one said capsule; - an actuation linkage, operable to cause relative movements between the first part and the second part of the infusion chamber, between a spaced position and a close position; - ejector means (70, 71, 86), which are associated to the first part and capable to push the capsule towards the outside of the housing when the first part and the second part are brought towards their spaced position, wherein one of the first part and the second part is configured for introduction of the fluid into the capsule and the other of the first part and the second part is configured for dispensing the liquid product from the infusion chamber, wherein the ejector means (70, 71, 86) comprise an ejector member which is movable with respect to a bottom of the first part in such a way that: - in the passage from said spaced position to said close position, the ejector member assumes a position with respect to the bottom of the first part such as not to interfere with the insertion of a capsule into the housing; and - in the passage from said close position to said spaced position, the ejector member assumes a position with respect to the bottom of the first part such as to cause ejection of the capsule from the housing, wherein the ejector member is constrained to a movable element of the actuation linkage by means of a mechanical connection (71, 86) pre-arranged for controlling displacement of the ejector member both in the passage from said spaced position to said close position and in the passage from said close position to said spaced position, characterized in that the mechanical connection (71, 86) is a desmodromic connection, comprising at least one connection member angularly movable with said movable element of the actuation linkage. - an infusion chamber that comprises a first part and a second part, at least the first part defining a housing configured for receiving at least partially one said capsule; - an actuation linkage, operable to cause relative movements between the first part and the second part of the infusion chamber, between a spaced position and a close position; - ejector means (70, 71, 86), which are associated to the first part and capable to push the capsule towards the outside of the housing when the first part and the second part are brought towards their spaced position, wherein one of the first part and the second part is configured for introduction of the fluid into the capsule and the other of the first part and the second part is configured for dispensing the liquid product from the infusion chamber, wherein the ejector means (70, 71, 86) comprise an ejector member which is movable with respect to a bottom of the first part in such a way that: - in the passage from said spaced position to said close position, the ejector member assumes a position with respect to the bottom of the first part such as not to interfere with the insertion of a capsule into the housing; and - in the passage from said close position to said spaced position, the ejector member assumes a position with respect to the bottom of the first part such as to cause ejection of the capsule from the housing, - in the passage from said spaced position to said close position, the ejector member assumes a position with respect to the bottom of the first part such as not to interfere with the insertion of a capsule into the housing; and - in the passage from said close position to said spaced position, the ejector member assumes a position with respect to the bottom of the first part such as to cause ejection of the capsule from the housing,