Star clusters born in galactic disks are disrupted due to both the tidal stripping and the internal evolution of star clusters. We performed N-body simulations of star clusters in a galactic disk. In our simulations, both star clusters and galactic disks are modeled as N-body systems and are integrated using a tree-direct hybrid code, BRIDGE. BRIDGE treats only star clusters as collisional systems using a direct code and the others as collisionless systems using a treecode. We found that star clusters migrate radially due to the interaction with spiral arms and disrupted when they migrate inward. The tidal tails spread over 1-2 kpc, but the tail stars are still close to their parent cluster in the velocity space.