In this paper, we propose multiple instruction issuable multi-streaming as a processor architecture for 3D graphics processor. Multistreaming can eliminate inteferences within concurrently executing instructions inthe pipelined processor to allow enough parallelism for parallel processing. Through cycle level simulation study, we show that the proposed architecture outperforms a conventional RISC processor, MIPS R3000 by three times with reasonable resource overheads. Multiple instruction issuable multistreaming processor will be a bood architecture for instruction processor when a large number of threads are guaranteed.