1978 Fischer-Grand Prix
Date	23–29 October
Edition	4th
Category	Grand Prix
Draw	32S / 16D
Prize money	$75,000
Surface	Hard / indoor
Location	Vienna, Austria
Venue	Wiener Stadthalle
Champions
Singles
Stan Smith[1]
Doubles
Víctor Pecci / Balázs Taróczy[2]
← 1977 · Vienna Open · 1979 →

The 1978 Fischer-Grand Prix was a men's tennis tournament played on indoor hard courts at the Wiener Stadthalle in Vienna, Austria that was part of the 1978 Colgate-Palmolive Grand Prix. It was the fourth edition of the tournament and was held from 23 October until 29 October 1978. Fourth-seeded Stan Smith won the singles title.

Stan Smith defeated Balázs Taróczy 4–6, 7–6, 7–6, 6–3

• It was Smith's 5th title of the year and the 72nd of his career.

Víctor Pecci / Balázs Taróczy defeated Bob Hewitt / Frew McMillan 6–3, 6–7, 6–4

• It was Pecci's 5th title of the year and the 8th of his career. It was Taróczy's 5th title of the year and the 8th of his career.

• ATP tournament profile
• ITF tournament edition details