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 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 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 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 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 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. <EOS>