Front unit for a touring binding, comprising: two lateral bearing portions (16a, 16b) which are arranged on a ski transverse axis running substantially orthogonally to a ski longitudinal axis and parallel to a ski plane and which are designed to engage lateral counter bearing portions of a ski boot when the front unit is in a closed position in order to hold the ski boot on the front unit such that it can pivot about the ski transverse axis, and a longitudinal positioning portion on which the ski boot can be supported in an entry position in such a way that the counter bearing portions are positioned, with regard to their position along the ski longitudinal axis, in a position ready for engagement relative to the bearing portions (16a, 16b), wherein the longitudinal positioning portion is set in the open position in a first setting for supporting the ski boot in the entry position, wherein the longitudinal positioning portion is locked in the first setting in the open position, and in the closed position is adjustable between the first setting and a second setting, in which it allows the ski boot to pivot about the ski transverse axis for walking, wherein the longitudinal positioning portion is locked in neither the first setting nor the second seting in the closed position, wherein the front unit is adjustable between an open position in which the bearing portions (16a, 16b) and the counter bearing portions are disengaged, and the closed position in which the bearing portions (16a, 16b) and the counter bearing portions are engaged, wherein the longitudinal positioning portion is fixed relative to the bearing portions (16a, 16b) in the open position of the front unit and is movable relative to the bearing portions (16a, 16b) in the closed position of the front unit, characterized in that the longitudinal positioning portion is preloaded in the direction of the first position by an elastic means. two lateral bearing portions (16a, 16b) which are arranged on a ski transverse axis running substantially orthogonally to a ski longitudinal axis and parallel to a ski plane and which are designed to engage lateral counter bearing portions of a ski boot when the front unit is in a closed position in order to hold the ski boot on the front unit such that it can pivot about the ski transverse axis, and a longitudinal positioning portion on which the ski boot can be supported in an entry position in such a way that the counter bearing portions are positioned, with regard to their position along the ski longitudinal axis, in a position ready for engagement relative to the bearing portions (16a, 16b), wherein the longitudinal positioning portion is set in the open position in a first setting for supporting the ski boot in the entry position, wherein the longitudinal positioning portion is locked in the first setting in the open position, and in the closed position is adjustable between the first setting and a second setting, in which it allows the ski boot to pivot about the ski transverse axis for walking, wherein the longitudinal positioning portion is locked in neither the first setting nor the second seting in the closed position, wherein the front unit is adjustable between an open position in which the bearing portions (16a, 16b) and the counter bearing portions are disengaged, and the closed position in which the bearing portions (16a, 16b) and the counter bearing portions are engaged, wherein the longitudinal positioning portion is fixed relative to the bearing portions (16a, 16b) in the open position of the front unit and is movable relative to the bearing portions (16a, 16b) in the closed position of the front unit,