A door handle system for a safety door, especially for a sliding door or swing door, comprising the following features: - a bolt unit is provided, wherein the bolt unit comprises a housing with a bolt opening, and a handle, wherein the handle is arranged at the housing; - the bolt unit comprises a bolt module with a bolt; - the bolt is moveable respective to the housing, wherein the bolt can be moved out of the bolt opening of the housing for engaging with a corresponding lock opening of a lock unit; - the bolt unit comprises a restraining device with a bolt stopper; - the bolt stopper is configured to be switched between a blocking position in which it engages with the bolt and a release position in which it releases the bolt thereby allowing the bolt to move out of the bolt opening; - an activation means is provided, wherein the bolt stopper is configured to get in contact with the activation means in a closed state of the safety door thereby switching to the release position; - the bolt module comprises a body portion, wherein the bolt forms a first end of the body portion and wherein the bolt unit comprises a spring, wherein the spring is configured to apply a force on the body portion in the direction of the bolt opening of the housing; characterized in that - the housing of the bolt unit comprises a fastening opening opposite to the bolt opening, wherein the body portion comprises a fastening part forming a second end of the body portion opposite to the first end and wherein the fastening part is configured to protrude out of the fastening opening of the housing if the bolt stopper is in the blocking position and wherein the fastening part is arranged within the housing if the bolt stopper is in the release position and wherein the fastening part is configured to engage with a fastening mean thereby limiting the movement of the bolt respective to the housing. - a bolt unit is provided, wherein the bolt unit comprises a housing with a bolt opening, and a handle, wherein the handle is arranged at the housing; - the bolt unit comprises a bolt module with a bolt; - the bolt is moveable respective to the housing, wherein the bolt can be moved out of the bolt opening of the housing for engaging with a corresponding lock opening of a lock unit; - the bolt unit comprises a restraining device with a bolt stopper; - the bolt stopper is configured to be switched between a blocking position in which it engages with the bolt and a release position in which it releases the bolt thereby allowing the bolt to move out of the bolt opening; - an activation means is provided, wherein the bolt stopper is configured to get in contact with the activation means in a closed state of the safety door thereby switching to the release position; - the bolt module comprises a body portion, wherein the bolt forms a first end of the body portion and wherein the bolt unit comprises a spring, wherein the spring is configured to apply a force on the body portion in the direction of the bolt opening of the housing; characterized in that - the housing of the bolt unit comprises a fastening opening opposite to the bolt opening, wherein the body portion comprises a fastening part forming a second end of the body portion opposite to the first end and wherein the fastening part is configured to protrude out of the fastening opening of the housing if the bolt stopper is in the blocking position and wherein the fastening part is arranged within the housing if the bolt stopper is in the release position and wherein the fastening part is configured to engage with a fastening mean thereby limiting the movement of the bolt respective to the housing.