The aim of this research isto investigate an intelligibility and comprehensibility problems faced
by EFL students in English Education Department at Antasari State University Banjarmasin.
As EFL student’s obstacle to achieve good English speaking is very hard to reach, to a master
English and fluent. This research focus in intelligibility which mean an ability to
understandable by speaker in field of English rules means there are certain rule to fulfil the
intelligibility, such as good pronunciation and grammar. Then, comprehensibility is when a
listener understands what the message of a speaker. This research conducted by using
qualitative research and the data of this research collected through questionnaire. Twenty
students were participant on this research to find their problems in intelligibility and
comprehensibility, the students on this research were already passed in speaking class course
one. The objective on this research to identify student’s intelligibility and comprehensibility
problems when they communicating in English in the class. This research found several
problems of students in intelligibility and comprehensibility, there are pronunciation, grammar
and English fluency problems faced by students.