The aim of this research is to investigate the assimilation of some consonant sounds in Eghlid, one of the Iranian dialects. There are different kinds of assimilation and this articles pays to total/ progressive as well as partial/ regressive assimilation of some Eghlidian consonant sounds. The approach of this field-based research is comparative, descriptive and analytical, investigating the assimilation of /n/ to /m/ before /b/, the assimilation of /t/ to /s/ in /st/ consonant cluster, the assimilation of /d/ to /z/ in /zd/ consonant cluster, the assimilation of palatal stops // and // to their velar stop counterparts, and the assimilation of /l/ and /r/ to each other. The achieved results show the specific assimilation pattern of Eghlidian dialect with regard to the standard Persian pronunciation. The phonological analysis and the phonetic transcription of examples will be presented as well.