The 1978 Stockholm Open was a men's tennis tournament played on hard courts and part of the 1978 Colgate-Palmolive Grand Prix and took place at the Kungliga tennishallen in Stockholm, Sweden. The tournament was held from 6 November through 12 November 1978. Third-seeded John McEnroe won the singles title.
See main article: 1978 Stockholm Open – Singles. 
John McEnroe defeated Tim Gullikson, 6–2, 6–2
See main article: 1978 Stockholm Open – Doubles. 
Wojciech Fibak / Tom Okker defeated Bob Lutz / Stan Smith, 6–3, 6–2