The men's 90 kg weightlifting competitions at the 1956 Summer Olympics in Melbourne took place on 26 November at the Royal Exhibition Building.

[1] It was the second appearance of the middle heavyweight class.

The best score for each lift was summed to give a total.

If two or more weightlifters finished with the same total, the competitors' body weights were used as the tie-breaker (lighter athlete wins).

[1] Prior to this competition, the existing world and Olympic records were as follows.