A press brake that performs bending with respect to a workpiece by a die and a punch, the press brake comprising: a die; a punch arranged so as to be opposed to the die and including punch elements lined up in a longitudinal direction of the die; a punch supporting member that supports the punch; a moving device that moves the punch supporting member relative to the die in an upper-lower direction; position controllers (11, 12, 13) that adjust positions of the punch elements relative to the punch supporting member in the upper-lower direction and change a shape of the punch, the shape being formed by the punch elements, and overload preventing devices that allow movements of the punch elements in the upper-lower direction in case each of loads input to the punch elements exceeds a set value, characterized in that each of the overload preventing devices includes: a piece member coupled to the punch element, the load being transmitted to the piece member; a contact member that is in contact with the piece member from a lateral side; a biasing member that is supported by the punch supporting member, biases the contact member in such a direction that the contact member approaches the piece member, and restricts movement of the piece member in the upper-lower direction; and a load transmitting structure (21a, 22a) that transmits the load from the piece member to the biasing member and cancels the restriction of the movement of the piece member in the upper-lower direction. a die; a punch arranged so as to be opposed to the die and including punch elements lined up in a longitudinal direction of the die; a punch supporting member that supports the punch; a moving device that moves the punch supporting member relative to the die in an upper-lower direction; position controllers (11, 12, 13) that adjust positions of the punch elements relative to the punch supporting member in the upper-lower direction and change a shape of the punch, the shape being formed by the punch elements, and overload preventing devices that allow movements of the punch elements in the upper-lower direction in case each of loads input to the punch elements exceeds a set value, characterized in that each of the overload preventing devices includes: a piece member coupled to the punch element, the load being transmitted to the piece member; a contact member that is in contact with the piece member from a lateral side; a biasing member that is supported by the punch supporting member, biases the contact member in such a direction that the contact member approaches the piece member, and restricts movement of the piece member in the upper-lower direction; and a load transmitting structure (21a, 22a) that transmits the load from the piece member to the biasing member and cancels the restriction of the movement of the piece member in the upper-lower direction. a piece member coupled to the punch element, the load being transmitted to the piece member; a contact member that is in contact with the piece member from a lateral side; a biasing member that is supported by the punch supporting member, biases the contact member in such a direction that the contact member approaches the piece member, and restricts movement of the piece member in the upper-lower direction; and a load transmitting structure (21a, 22a) that transmits the load from the piece member to the biasing member and cancels the restriction of the movement of the piece member in the upper-lower direction.