The Men's Middleweight Weightlifting Event (77 kg) is the fourth men's weight class event at the weightlifting competition, limited to competitors with a maximum of 77 kilograms of body mass. The competition at the 1999 World Weightlifting Championships took place in Athens, Greece on 25 November 1999. Each lifter performed in both the snatch and clean and jerk lifts, with the final score being the sum of the lifter's best result in each. The athlete received three attempts in each of the two lifts; the score for the lift was the heaviest weight successfully lifted.