The Nissan Diesel Space Runner RA (kana:日産ディーゼル・スペースランナーRA) was a heavy-duty single-decker bus produced by the Japanese manufacturer Nissan Diesel from 2005 until 2010.

It can be either built as a complete bus or a bus chassis.

The styling is completely different from the Nissan Diesel UA, that it has a rounded roof dome (more rounded than the UA) and a separately mounted destination sign.

The Space Runner RA engine using AdBlue Selective Catalytic Reduction technology.