This study attempted to investigate the English listening and speaking problems and the causes of these problems among private vocational students in Bangkok. The instrument used for collecting data in this study was a questionnaire composed for four parts: the first part was concerned with the general background information of the participants, the second part dealt with problems with English listening, the third with problems with English speaking, and the last part was about the causes of English listening and speaking problems. The participants of this study consisted of 372 students, from all five majors, all in their third year of the Vocational Certificate in Semester 2 of 2011. The data from the questionnaires were analyzed to identify English listening and speaking problems as well as the causes of these problems among students at a private vocational school in Bangkok, Thailand.