The purpose of this study was to explore the effectiveness of strategy training in teaching English for Korean elementary school students. It also attempted to provide some empirical data for more successful strategy training in elementary English education. Sixty six fifth grade elementary school students from two intact classes (33 each) participated in the study as the experimental group and the control group. For 17 weeks, the experimental group was given strategy training in addition to traditional instruction, while the control group was taught in the traditional way only. Some of the major findings are as follows: 1) Strategy-trained group did not show significantly better improvement over the traditionally-taught group in their English proficiency; 2) Strategy-trained group used all categories of learning strategy significantly more frequently at the end of the experimental period than traditionally-taught group; 3) Both the quantity and quality of strategy use was affected by the learner's English proficiency. From these results it was concluded that a strategy training program for elementary school English learners could be fruitful and viable. Suggestions for further studies are presented along with limitations inherent in the present study.