Given the fact mentioned above that CLT appears to continuously fail to equip Thai learners with adequate interactive competence, its application in the country merits review. As suggested by Islam and Bari (2012), despite its popularity, the CLT approach should be investigated to find out whether there is a mismatch between theory and practice. In fact, Aliakbari and Jamalvani (2010) also inferred that the failure of CLT in practice may be the reason for the introduction of task-based language teaching (TBLT). Along similar lines, while embracing the goal of improving CLT application in Thai ELT, this paper proposes that CA, a sociological approach to studying everyday conversation, in conjunction with aspects of CLT, can be used to produce better competent speakers of English. It is particularly argued that CA can be employed to both enhance learners’ conversational abilities and serves as a diagnostic tool to pinpoint communication challenges encountered by students and teachers during an interaction in a Thai EFL classroom (cf. Martin, 2000).