We put DHT (distributed hash table) based P2P (peer to peer) application - chord into MANET (mobile ad hoc network) in this paper. Then, we propose a new routing modified scheme MA-chord which bases on a unicast scheme with DHT. MA-chord can be efficiently used to not only provide indirect, key-based overlay routing, but also conventional direct routing. Our simulation implies that MA-chord can markedly outperform conventional reactive ad hoc routing (AODV). Therefore, MANET nodes can run MA-chord for application purpose, especially P2P applications.