A machine for making liquid or semi-liquid food products, provided with a processing chamber for making an ice cream product, the machine comprising: - a frame defining an opening giving access to the chamber; - a stirrer mounted inside said chamber; - a cooling system, provided with at least one heat exchanger associated with the chamber to exchange heat with the chamber in order to cool the chamber; - closing means connected to the frame and movable between a closed configuration, where they at least partly occlude the opening, and an open configuration, where they allow access to the chamber through the opening, the closing means comprising at least one door (21; 22; 23) hinged to the frame; - retaining means acting on the closing means to keep the closing means in the closed configuration; wherein the retaining means comprise a rotary element, connected to one between the at least one door (21; 22; 23) and the frame and a respective stop associated with the other between the at least one door (21; 22; 23) and the frame, the rotary element being rotatably movable about a respective axis of rotation between a retaining configuration, where it engages the stop to stop the opening movement of the at least one door (21; 22; 23), and a disengaged configuration, where it disengages the stop to allow the opening movement of the at least one door (21; 22; 23), wherein the retaining means require the rotary element to be rotated in order to pass from the retaining configuration to the disengaged configuration, and vice versa; wherein rotating the rotary element between the retaining configuration to the disengaged configuration causes constrained movement of the door (21; 22; 23) between the closed configuration and a half-open configuration, where the at least one door (21; 22; 23) limits access to the chamber through the opening; wherein the rotary element has a crest extending in helical cylindrical fashion about the axis of rotation and configured to engage the stop to constrain the movement of the at least one door (21; 22; 23) towards the open configuration; the machine characterized in that the rotating element has a helical cylindrical guide defined by successive turns of the crest, the helical cylindrical guide being configured to accommodate the stop to define, in conjunction with the stop, a cam adapted to adjust the position of the at least one door (21; 22; 23) between the closed configuration and the half-open configuration as a function of a rotation of the rotary element between the retaining configuration and the disengaged configuration. - a frame defining an opening giving access to the chamber; - a stirrer mounted inside said chamber; - a cooling system, provided with at least one heat exchanger associated with the chamber to exchange heat with the chamber in order to cool the chamber; - closing means connected to the frame and movable between a closed configuration, where they at least partly occlude the opening, and an open configuration, where they allow access to the chamber through the opening, the closing means comprising at least one door (21; 22; 23) hinged to the frame; - retaining means acting on the closing means to keep the closing means in the closed configuration; wherein the retaining means comprise a rotary element, connected to one between the at least one door (21; 22; 23) and the frame and a respective stop associated with the other between the at least one door (21; 22; 23) and the frame, the rotary element being rotatably movable about a respective axis of rotation between a retaining configuration, where it engages the stop to stop the opening movement of the at least one door (21; 22; 23), and a disengaged configuration, where it disengages the stop to allow the opening movement of the at least one door (21; 22; 23), wherein the retaining means require the rotary element to be rotated in order to pass from the retaining configuration to the disengaged configuration, and vice versa; wherein rotating the rotary element between the retaining configuration to the disengaged configuration causes constrained movement of the door (21; 22; 23) between the closed configuration and a half-open configuration, where the at least one door (21; 22; 23) limits access to the chamber through the opening; wherein the rotary element has a crest extending in helical cylindrical fashion about the axis of rotation and configured to engage the stop to constrain the movement of the at least one door (21; 22; 23) towards the open configuration; the machine characterized in that the rotating element has a helical cylindrical guide defined by successive turns of the crest, the helical cylindrical guide being configured to accommodate the stop to define, in conjunction with the stop, a cam adapted to adjust the position of the at least one door (21; 22; 23) between the closed configuration and the half-open configuration as a function of a rotation of the rotary element between the retaining configuration and the disengaged configuration.