A novel routing protocol for ad hoc network — DSARP (Delay Sensitive Adaptive Routing Protocol) is presented in this paper. According to DSARP, the reliable route for delay sensitive traffic can be supplied and the route can be selected based on the constrained condition --"the Shortest route and the Lowest average delay". Therefore, the "hotspot" on the shortest path can be avoided. Meanwhile, the DSARP can assure to provide QoS guarantee and improve the performance of the network. Simulation results show that DSARP performs better than DSR routing protocol used in ad hoc wireless network.