This paper analyzes Indonesian EFL learners' perspectives on pronouncing problematic English consonant sounds. Therefore, the opinions of the Indonesian EFL learners about the difficulty level of 24 problematic consonants were the expected data. A descriptive qualitative method was used to analyze the data of this study. The study reveals that interlingual, intralingual, and developmental factors influence problematic English consonant sounds like /z/, /ʃ/, /ʒ/, /tʃ/, /ʤ/, /v/, /θ/, /ð/, and /r/, suggesting EFL learners are more attentive to these sounds to improve pronunciation.