Touring or cross-country ski binding comprising: a housing comprising a first recess for receiving a ski shoe pin, a locking member movable between a locking position, in which one or more locking portions of the locking member cooperate with the first recess for mutually preventing a ski shoe pin from being removed from the first recess, and a open position, in which the one or more locking portions are retracted from the first recess for allowing the ski shoe pin to enter and exit the first recess, a biasing means configured to bias the locking member towards the locking position, and an activation member rotatably attached to the housing for rotation around a transversal rotational axis of the binding, wherein the activation member and the locking member are operatively connected and wherein the locking member is provided with at least one outer portion shaped to allow a ski shoe pin to force the locking member from the locking position towards the open position at entry of the ski shoe pin into the first recess, characterized in that the activation member is provided with an arm extending radially away from the transversal rotational axis of the activation member, wherein the activation member and the locking member are operatively connected by means of mutually cooperating connection means configured such that at rotation of the arm in a first rotational direction through a predetermined lower operational range of the arm, the activation member forces the locking member from the locking position to the open position, wherein the mutually cooperating connection means are also configured such that any movement of the arm caused by movement of the locking member from the locking position to the open position occurs only within the predetermined lower operational range of the arm, and wherein the binding is provided with a means (16, 17) for releasably holding the locking member in its open position at movement of the arm to a predetermined upper position outside the predetermined lower operational range of the arm. a housing comprising a first recess for receiving a ski shoe pin, a locking member movable between a locking position, in which one or more locking portions of the locking member cooperate with the first recess for mutually preventing a ski shoe pin from being removed from the first recess, and a open position, in which the one or more locking portions are retracted from the first recess for allowing the ski shoe pin to enter and exit the first recess, a biasing means configured to bias the locking member towards the locking position, and an activation member rotatably attached to the housing for rotation around a transversal rotational axis of the binding, wherein the activation member and the locking member are operatively connected and wherein the locking member is provided with at least one outer portion shaped to allow a ski shoe pin to force the locking member from the locking position towards the open position at entry of the ski shoe pin into the first recess, characterized in that the activation member is provided with an arm extending radially away from the transversal rotational axis of the activation member, wherein the activation member and the locking member are operatively connected by means of mutually cooperating connection means configured such that at rotation of the arm in a first rotational direction through a predetermined lower operational range of the arm, the activation member forces the locking member from the locking position to the open position, wherein the mutually cooperating connection means are also configured such that any movement of the arm caused by movement of the locking member from the locking position to the open position occurs only within the predetermined lower operational range of the arm, and wherein the binding is provided with a means (16, 17) for releasably holding the locking member in its open position at movement of the arm to a predetermined upper position outside the predetermined lower operational range of the arm.