An emergency stop device with a hand brake system, comprising: brake units which are provided on both sides of a car and selectively interfered with guide rails so as to restrain the movement of the car; an operation unit connected with the brake units to manually provide a braking force to the braking units; an interlocking unit which causes the brake unit provided on both sides of the car to be interlocked by the operation of the operation unit, the brake units comprising: accommodation blocks that form restraint slots configured to accommodate the guide rails, respectively, each of the slots being narrowed toward an upper side; and friction blocks that are provided in the accommodation blocks, the friction blocks being configured to be moved in the restraint slots by operating the operation unit to be interfered with the guide rails, the operation unit comprising a lever unit, the lever unit comprising: an operation piece hinged to the car; an operation lever provided on the operation piece to rotate the operation piece; and a braking maintaining unit provided on the operation piece to maintain the braking state of the car, characterised in that: the operation unit further comprises rotation brackets which are rotatably provided on the car, one end of each of the rotation brackets being connected with one of the friction blocks so that, when the rotation brackets are rotated, the friction blocks are interfered with the guide rails, in that the lever unit is configured to rotate the rotation brackets, and in that the lever unit further comprises a link member eccentrically connected to the operation piece to transmit the rotation of the operation piece to the rotation brackets. brake units which are provided on both sides of a car and selectively interfered with guide rails so as to restrain the movement of the car; an operation unit connected with the brake units to manually provide a braking force to the braking units; an interlocking unit which causes the brake unit provided on both sides of the car to be interlocked by the operation of the operation unit, the brake units comprising: accommodation blocks that form restraint slots configured to accommodate the guide rails, respectively, each of the slots being narrowed toward an upper side; and friction blocks that are provided in the accommodation blocks, the friction blocks being configured to be moved in the restraint slots by operating the operation unit to be interfered with the guide rails, accommodation blocks that form restraint slots configured to accommodate the guide rails, respectively, each of the slots being narrowed toward an upper side; and friction blocks that are provided in the accommodation blocks, the friction blocks being configured to be moved in the restraint slots by operating the operation unit to be interfered with the guide rails, the operation unit comprising a lever unit, the lever unit comprising: an operation piece hinged to the car; an operation lever provided on the operation piece to rotate the operation piece; and a braking maintaining unit provided on the operation piece to maintain the braking state of the car, an operation piece hinged to the car; an operation lever provided on the operation piece to rotate the operation piece; and a braking maintaining unit provided on the operation piece to maintain the braking state of the car, the operation unit further comprises rotation brackets which are rotatably provided on the car, one end of each of the rotation brackets being connected with one of the friction blocks so that, when the rotation brackets are rotated, the friction blocks are interfered with the guide rails, in that the lever unit is configured to rotate the rotation brackets, and in that the lever unit further comprises a link member eccentrically connected to the operation piece to transmit the rotation of the operation piece to the rotation brackets.