This research aimed to find out the effectiveness of using song to teach students’ pronunciation of –Ed in non-extra syllable past tense. Method of this research is an experimental study. The population of this research is all students of LP3I course center Ngaliyan Square in the academic year 2016/2017. And the participant 62 students. The subjects of this research were divided into two groups: experimental class which was taught using song as media and control class which was taught without song as its media. The researcher used test and documentation as instruments of data collecting technique. The study showed that: (1) The test of hypothesis using t-test formula shows the value of the t-test is higher than the value of the t-table. The value of t-test is 5.951, while the value of t-table on = 5% is 1.67 (5.951> 1.67). The hypothesis is accepted. Therefore, using song as media can be used and is effective in teaching pronunciation of -ed in non-extra syllable past tense. The suggestions are (1) The students should study harder than before, because pronunciation is one of difficult subjects as they considered. They have to learn from the mistakes that they made before. So, they will not repeat the same mistakes. (2) Teachers’ explanation should be clear and easy to be understood by the students, (3) The writer hopes this thesis can be useful for the readers. So, they will know that using music performance is effective. It will help students interested and learn pronunciation of -ed in non-extra syllable past tense easily.