This research was intended to describe the pronunciation error on English consonants and the factors causing pronunciation error. Pronunciation error in this research referred to error in producing English consonants (/θ/, /ð/, /ʒ/, /ʤ/, /ʧ/). The research subject of this research was the eighth semester of 2015A English Study Program Student at STKIP PGRI Sidoarjo. This research was descriptive qualitative with the data collected from pronunciation test and interview. The researcher was the main instrument of this research. The findings showed that the most frequently error was in the pronunciation of sound /ʒ/ as much 37%. The research subjects made errors in the same percentages in pronouncing the sound of /ð/ and /ʤ/ as much 13%, then research subjects made errors in the lowest percentage in pronouncing the sound of /ʧ/ as much 8%. The factors which caused the errors in consonant production (/θ/, /ð/, /ʒ/, /ʤ/, /ʧ) were (1) the difference spelling system of English and Indonesia in pronouncing words(2) the absence of some English sounds in Indonesia (3) the interference of mother tongue to English.