An elevator system comprising: an elevating unit moving up and down along a guide rail in a hoist way of an elevator; a pair of upper wedges provided in a mounting frame in a lower portion of the elevating unit and arranged facing each other, between which the guide rail is sandwiched, for braking the elevating unit by being moved along upper guide member having a slope and by sliding on the guide rail; a pair of lower wedges provided in the mounting frame and under the pair of upper wedges, and arranged facing each other, between which the guide rail is sandwiched, for braking the elevating unit by being moved along a lower guide member having a slope and by sliding on the guide rail; a rectangular operation lever, whose one end is mounted to a lift-up rod which is connected to a governor rope interlocking with the elevating unit and extends in parallel to the guide rail, while whose other end is perpendicularly fixed to an upper pivot axis which extends in a direction that the pair of upper wedges faces each other and is pivotably mounted to an upper portion of the mounting frame; a pair of first rectangular active levers, whose one ends are respectively mounted to the pair of upper wedges, while whose other ends are perpendicularly fixed to the upper pivot axis; a pair of second rectangular active levers, whose one ends are respectively mounted to the pair of lower wedges, while whose other ends are perpendicularly fixed to the lower pivot axis which extends in a direction that the lower wedges face each other, and is pivotably mounted to an lower portion of the mounting frame; and a linkage, whose length is previously set, for connecting, in an up-and-down direction, a one end of a third rectangular active lever whose other end is perpendicularly fixed to the upper pivot axis, with a one end of a fourth rectangular active lever whose other end is perpendicularly fixed to the lower pivot axis, characterized in that a distance to the lower wedges from a lower stopper plate provided in a lower portion of the mounting frame and in a position where braking force is imparted by pressing of the lower guide member and the guide rail to contact the lower wedges, is set longer, by the linkage, than a distance to the upper wedges from an upper stopper plate provided in an upper portion of the mounting frame and in a position where braking force is imparted by pressing of the upper guide member and the guide rail to contact the upper wedges. an elevating unit moving up and down along a guide rail in a hoist way of an elevator; a pair of upper wedges provided in a mounting frame in a lower portion of the elevating unit and arranged facing each other, between which the guide rail is sandwiched, for braking the elevating unit by being moved along upper guide member having a slope and by sliding on the guide rail; a pair of lower wedges provided in the mounting frame and under the pair of upper wedges, and arranged facing each other, between which the guide rail is sandwiched, for braking the elevating unit by being moved along a lower guide member having a slope and by sliding on the guide rail; a rectangular operation lever, whose one end is mounted to a lift-up rod which is connected to a governor rope interlocking with the elevating unit and extends in parallel to the guide rail, while whose other end is perpendicularly fixed to an upper pivot axis which extends in a direction that the pair of upper wedges faces each other and is pivotably mounted to an upper portion of the mounting frame; a pair of first rectangular active levers, whose one ends are respectively mounted to the pair of upper wedges, while whose other ends are perpendicularly fixed to the upper pivot axis; a pair of second rectangular active levers, whose one ends are respectively mounted to the pair of lower wedges, while whose other ends are perpendicularly fixed to the lower pivot axis which extends in a direction that the lower wedges face each other, and is pivotably mounted to an lower portion of the mounting frame; and a linkage, whose length is previously set, for connecting, in an up-and-down direction, a one end of a third rectangular active lever whose other end is perpendicularly fixed to the upper pivot axis, with a one end of a fourth rectangular active lever whose other end is perpendicularly fixed to the lower pivot axis, characterized in that a distance to the lower wedges from a lower stopper plate provided in a lower portion of the mounting frame and in a position where braking force is imparted by pressing of the lower guide member and the guide rail to contact the lower wedges, is set longer, by the linkage, than a distance to the upper wedges from an upper stopper plate provided in an upper portion of the mounting frame and in a position where braking force is imparted by pressing of the upper guide member and the guide rail to contact the upper wedges.