The present study aimed at exploring the individual and joint effects of teacher nonverbal immediacy (TNI), autonomy support (AUS), competence support (COS), and relatedness support (RES) on learners’ unwillingness to communicate (UTC) in the Taiwanese English as a foreign language (EFL) context. To this end, 258 EFL university freshmen (106 males, 152 females) satisfactorily completed a questionnaire consisting of Teacher Immediacy Scale, Need Support Questionnaire, and Unwillingness to Communicate Scale. As for individual effects, the results revealed that AUS, COS, and RES did have a significant effect on decreasing EFL learners’ UTC, but TNI did not. Regarding joint effects, the results indicated that a combination of TNI, AUS, COS, and RES significantly explained 16% of the variation in EFL learners’ UTC; COS was found to be the only predictor of EFL learners’ UTC. However, TNI, AUS, and RES failed to predict EFL learners’ UTC directly; they had indirect effects on decreasing EFL learners’ UTC through the mediation of COS, respectively. In the light of the present results, implications for instruction are addressed with the intention of helping EFL learners effectively cope with their UTC behaviors.