| Name | Ministry | Dates |
|---|
| 1. | Jean-Luc Pépin | under Trudeau | April 1, 1969 November 16, 1972 |
| 2. | Alastair Gillespie | under Trudeau | November 27, 1972 – September 25, 1975 |
| 3. | Donald Campbell Jamieson | under Trudeau | September 26, 1975 – September 13, 1976 |
| 4. | Joseph Jacques Jean Chrétien | under Trudeau | September 14, 1976 – September 15, 1977 |
| 5. | John Henry Horner | under Trudeau | September 16, 1977 – June 3, 1979 |
| 6. | Robert René de Cotret | under Clark | June 4, 1979 – March 2, 1980 |
| 7. | Herb Gray | under Trudeau | March 3, 1980 – September 29, 1982 |
| 8. | Edward C. Lumley | under Trudeau | September 30, 1982 – December 6, 1983 |
