This study investigates the analytical study for developing PEB(Pre-Engineered Building) connection Steel damper. The state-of the art of the steel beam-column seismic connection details were studied previously to develop proper damper for PEB connection. Finite element analysis is performed to develop the prototypes of damper under cyclic load. The study parameters of analysis are the shape, length, thickness, orientation and location of damper. As a result of finite element analysis, three prototype damper details for PEB seismic connection are derived. One is tapered plate on the lower flange of the rafter, another is C-plate on the center of panel zone and the other is brace on the beam-column connection.