The main purpose of this study was to evaluate the effect of the school lunch nutrition education program on the eating behavior of fourth-grade students. A six-week nutrition education program including classroom and lunchtime activities was tested in an elementary school in Taipei. The objectives for the program were to increase the intake of vegetables and milk, and frequencies of choosing healthier milk drink. Actual intakes of vegetable and milk during lunch were measured by weighing plate waste. The results show that the program increased the intake of vegetables and frequencies of choosing healthier milk drink, but the program had no significant effect on the intake of milk.