Tile hook for mounting a frame for for instance solar panels on a tile roof, which tile hook comprises: - a Z-shaped body having an elongate base part, a first end part extending from a first end of the elongate base part substantially perpendicularly of the longitudinal axis of the base part, and a second end part extending from a second end of the elongate base part substantially perpendicularly of the longitudinal axis of the base part and in opposite direction to the direction of the first end part; - a first mounting part for mounting on a frame for for instance solar panels, which first mounting part is slidable perpendicularly of the longitudinal axis of the base part and is arranged on the first end part; wherein the first mounting part comprises a first toothing and wherein the first end part comprises a second toothing; wherein the first mounting part is displaceable in a direction parallel to the longitudinal axis of the base part between a first position in which the first toothing and the second toothing engage in each other and a second position in which the first toothing and the second toothing are out of engagement with each other, - locking means for holding the first mounting part in the first position characterized in that the locking means comprise a partially wedge-shaped body which is slidable perpendicularly of the longitudinal axis of the base part between a release position and a locking position, wherein in the locking position the partially wedge-shaped body holds the mounting part in the first position and in the release position the first mounting part is freely displaceable between the first and second position. - a Z-shaped body having an elongate base part, a first end part extending from a first end of the elongate base part substantially perpendicularly of the longitudinal axis of the base part, and a second end part extending from a second end of the elongate base part substantially perpendicularly of the longitudinal axis of the base part and in opposite direction to the direction of the first end part; - a first mounting part for mounting on a frame for for instance solar panels, which first mounting part is slidable perpendicularly of the longitudinal axis of the base part and is arranged on the first end part; wherein the first mounting part comprises a first toothing and wherein the first end part comprises a second toothing; wherein the first mounting part is displaceable in a direction parallel to the longitudinal axis of the base part between a first position in which the first toothing and the second toothing engage in each other and a second position in which the first toothing and the second toothing are out of engagement with each other, wherein the first mounting part comprises a first toothing and wherein the first end part comprises a second toothing; wherein the first mounting part is displaceable in a direction parallel to the longitudinal axis of the base part between a first position in which the first toothing and the second toothing engage in each other and a second position in which the first toothing and the second toothing are out of engagement with each other, - locking means for holding the first mounting part in the first position characterized in that the locking means comprise a partially wedge-shaped body which is slidable perpendicularly of the longitudinal axis of the base part between a release position and a locking position, wherein in the locking position the partially wedge-shaped body holds the mounting part in the first position and in the release position the first mounting part is freely displaceable between the first and second position. characterized in that the locking means comprise a partially wedge-shaped body which is slidable perpendicularly of the longitudinal axis of the base part between a release position and a locking position, wherein in the locking position the partially wedge-shaped body holds the mounting part in the first position and in the release position the first mounting part is freely displaceable between the first and second position.