In this paper, we present an efficient cooperative transmission scheme for high speed 60GHz WPAN system. We consider a transmission system which consists of a source, a destination, and a relay. Data transmission from a source to a destination consists of first and second tine frames. In the first frame a source broadcasts encoded information bits by using a convolutional code (CC). In the second frame the relay decodes the received bits and re-encodes information bits by a systematic Reed-Solomon (RS) code. Then only parity bits of the RS code are transmitted to the destination by using another CC. The destination decodes information data based on the CC encoded information bits from the source and the other CC encoded RS parity bits from the relay. In the proposed cooperative transmission scheme the transmitted data in the second frame is much smaller than that in the first frame. This property results in high throughput with still path diversity. The cost is increased computational complexity in the relay.