In this study a hybrid energy dissipation device is developed by combining a steel slit damper and linear-slot friction dampers to be used for seismic retrofit of structures. The hybrid damper has an advantage in that friction dampers are activated for small earthquakes or strong wind while slit damper remains elastic, and both friction and slit dampers work simultaneously for strong earthquakes. Cyclic loading tests of the linear-slot friction, slit, and the combined hybrid dampers are carried out to evaluate their seismic energy dissipation capability.