The 1978 Queen's Club Championships was a men's tennis tournament played on outdoor grass courts at the Queen's Club in London in the United Kingdom that was part of the 1978 Colgate-Palmolive Grand Prix circuit. It was the 76th edition of the tournament and was held from 19 June through 24 June 1978. Tony Roche won the singles title.

Tony Roche defeated John McEnroe 8–6, 9–7

Bob Hewitt / Frew McMillan defeated Fred McNair / Raúl Ramírez 6–2, 7–5