This research was aimed at finding out whether or not the use of acoustic song can develop the speaking skill of the tenth grade students at PPM Al-Istiqamah Palu. This research applied a pre experimental research design involving only one sample group. The sample of this research was selected by a cluster sampling technique. The instrument of data collection was a test which was given to the research sample as pre-test and post-test. The data gathered were analyzed statistically. The result of the data shows that the t- counted value (15.35) was greater than the t- table value (1.721) by applying 0.05 level of significance and 21 (22 – 1) degree of freedom (df). It means that the use of acoustic can significantly develop the students’ speaking skill.Keywords: Developing; Speaking Skill; Acoustic Song