Research studies on allo-repetition, considered a communicative strategy in the discourse, have been conducted with more focus on second/foreign language learning. In this study, allo-repetition in EFL multi-party short plays is analyzed. The main purpose is to find out how EFL learners utter allo-repetition in their role-play discourse and to realize the communicative functions of allo-repetition. The participants are thirty-six students from one high school in Northern Taiwan. They were divided into four groups, each group being assigned to have a fifteen-minute English short play. Criteria for categorizing forms and communicative functions of allo-repetition are referred to Tannen's (1989), Perez-Pereira's (1994), and Sawir's (2004) research findings. Results of the analysis indicate that the modified form of allo-repetition is most preferred by EFL high school students. In addition, there are altogether six communicative functions for their utterances of allo-repetition: (I) to indicate participatory listenership, (2) to justify li stenership, (3) to indicate surprise, (4) to request clarification, (5) to reinforce responses, and (6) to refute and query. Among all, the communicative function for refuting and querying represents the highest frequency.