Mr. Olympia 1978 Men's Open
Frank Zane won the Men's Open division at the Mr. Olympia 1978, ahead of Robby Robinson and Roy Callender. Full official placings below.
| Place | Athlete | Country |
|---|---|---|
| 1 | Frank Zane | USA |
| 2 | Robby Robinson | USA |
| 3 | Roy Callender | Barbados |
| 4 | Boyer Coe | USA |
| 5 | Kalman Szkalak | Hungary |
| 6 | Danny Padilla | USA |
| 7 | Ed Corney | USA |
| 8 | Tony Emmott | UK |
| 9 | Dennis Tinerino | USA |
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