Franswa Pierre "Buks" Marais (13 December 1927 – 12 December 1996) was a South African rugby union wing.
Buks played club rugby for Paarl and provincial rugby for Boland.
Marais was capped seven time for the South African national team (springboks) and was a member of the 1951–52 South Africa rugby tour of Great Britain, Ireland and France.