This thesis is under the title of "Improving Students Speaking Ability by Using Role Play". Role play is one of the teaching approaches under Communicative Language Teaching (CLT). The writer conducted a library study, which was conducted through exploration in library and internet. The writer also conducted teaching simulation at SMU Inshafuddin Banda Aceh. The result of this study shows that the students get better understanding of daily speaking and using English in real life. Besides role play also increased their motivation in using English. in short, it is proven that the use of role play is effective to improve student's ability in speaking. Role play technique could be used as an alternative approach to teach speaking skill. The writer concludes that role play is one of the best methods that are proper to increase students speaking ability
Keyword: role play, speaking, CLT.