Fitting for sliding windows and sliding doors,. having a control rod which is formed by a profile-member,. having a bearing element, in which the control rod is supported rotatably about the longitudinal axis thereof and which is provided with a bearing opening, through which the control rod extends, and. having functional elements which can be controlled by means of a rotational movement of the control rod about the longitudinal axis thereof and the transmission of this rotational movement and force to the functional elements, a control lever and a securing sleeve being provided as functional elements and the securing sleeve having a receiving opening for the control rod and the control rod being received in a rotationally secure, positive-locking manner in the securing sleeve, characterised in that there is provided as an additional functional element a control sleeve which has a profile opening for the passage of the control rod and furthermore a control pin which is arranged eccentrically relative to the control rod and which engages in a control hole in the control lever, in that the profile-member of the control rod comprises a polygon with rounded corners, straight lateral faces of the polygon and rounded corners being provided, and the rounded corners forming circular rounded portions of the control rod and the straight lateral faces forming straight side walls of the control rod, in that the bearing opening of the bearing element is adapted to the profile-member of the control rod in such a manner that the circular rounded portions of the control rod are in abutment with a peripheral circular inner wall of the bearing element and the straight side walls of the control rod are spaced from said inner wall of the bearing element so that the control rod can be rotated in the bearing element about the longitudinal axis thereof and in that the profile opening of the control sleeve and the receiving opening of the securing sleeve are adapted to the profile-member of the control rod in such a manner that the straight side walls of the control rod and straight inner walls of the control sleeve and the securing sleeve move into abutment with each other so that the control rod is received in a rotationally secure, positive-locking manner in the control sleeve and the securing sleeve.. having a control rod which is formed by a profile-member,. having a bearing element, in which the control rod is supported rotatably about the longitudinal axis thereof and which is provided with a bearing opening, through which the control rod extends, and. having functional elements which can be controlled by means of a rotational movement of the control rod about the longitudinal axis thereof and the transmission of this rotational movement and force to the functional elements, a control lever and a securing sleeve being provided as functional elements and the securing sleeve having a receiving opening for the control rod and the control rod being received in a rotationally secure, positive-locking manner in the securing sleeve, characterised in that there is provided as an additional functional element a control sleeve which has a profile opening for the passage of the control rod and furthermore a control pin which is arranged eccentrically relative to the control rod and which engages in a control hole in the control lever, in that the profile-member of the control rod comprises a polygon with rounded corners, straight lateral faces of the polygon and rounded corners being provided, and the rounded corners forming circular rounded portions of the control rod and the straight lateral faces forming straight side walls of the control rod, in that the bearing opening of the bearing element is adapted to the profile-member of the control rod in such a manner that the circular rounded portions of the control rod are in abutment with a peripheral circular inner wall of the bearing element and the straight side walls of the control rod are spaced from said inner wall of the bearing element so that the control rod can be rotated in the bearing element about the longitudinal axis thereof and in that the profile opening of the control sleeve and the receiving opening of the securing sleeve are adapted to the profile-member of the control rod in such a manner that the straight side walls of the control rod and straight inner walls of the control sleeve and the securing sleeve move into abutment with each other so that the control rod is received in a rotationally secure, positive-locking manner in the control sleeve and the securing sleeve.