以普通話教授中國語文（「普教中」）在香港的推廣和實施已有逾十年之久，教師在實施這一語文教學的變革中經歷.一些困難，這些困難是導致教師憂慮的主要成因。為求了解「普教中」教師的憂慮，我們設計了一份開放式問卷，調查對象是香港中文大學中文教育碩士班 33位來自不同中、小學的在職「普教中」教師。調查結果表明，「『普教中』是否具有正面的教學效果」仍是在職「普教中」教師最憂慮的問題。本文基於調查結果，從師資狀況、學生學習能力和課程與教學設計等三方面進行分析和探討。研究可為學界提供一些真實的聲音，亦可讓學校有的放矢地紓緩教師憂慮，為更好地實施和推廣「普教中」提供適切的教學援助和指引。

In Hong Kong, Putonghua has been promoted for more than 10 years as a medium of instruction for teaching Chinese language (PMI) in schools. However, teachers have encountered difficulty in implementing this innovation with a lot of concerns. This study aimed to investigate Chinese language teachers’ major concerns. An open-ended questionnaire was administered to 33 in-service teachers who studied for a master’s degree at The Chinese University of Hong Kong. The survey revealed that teachers were most concerned about whether using Putonghua as the medium of instruction has positive effects on the teaching and learning of Chinese. Three important aspects are analyzed and discussed: teaching competence, students’ learning abilities, and curriculum and instructional design. This article not only reports the voices of frontline teachers but also provides suggestions for alleviating teachers’ concerns and strategies for improving Chinese language education in schools.