This research aims to investigate whether Prosody Pyramid is effective to teach pronunciation in speaking and how effective is the use of Prosody Pyramid to teach pronunciation in speaking to the seventh grade students of SMPN 1 Sungai Pinyuh in academic year 2016/2017. The research method used is pre-experimental and the design used is one group pre-test post-test design. The sample consists of 31 students who were chosen by using single cluster sampling technique. The data had been collected by using measurement technique. The tool of data collection was oral test in which the students had to pronounce a text containing sounds of /f/ and /v/. The results of data analysis showed that the mean score of the students' pre-test is 64.77 and the mean score of the students' post-test is 93.93. The interval score of the students' pre-test and post-test is 29.16. The t-ratio is 13.88. The t-critical is 2.042 with the df=30 and α=0.05. The effect size is 2.48. Hence, the effectiveness of teaching pronunciation in speaking using Prosody Pyramid to the seventh grade students of SMPN 1 Sungai Pinyuh in academic year 2016/2017 is very high.