This study aims to investigate the simplification of consonant cluster in the Jeonnam dialect from the viewpoint of linguistic change in dialect. For this purpose, an experiment was conducted on residents in the elderly and the youth class living in the southwestern(Jindo) and northwestern(Yeonggwang) part of Jeonnam. The results of this study are as follows: The simplification of the ‘ㄺ, ㄼ’ consonant cluster in the Jeonnam dialect traditionally preferred [-coronal], but has recently changed the tendency to choose [+sonorant] to become stronger. In other words, the simplification of consonant cluster in the Jeonnam dialect are becoming more inclined to choose /ㄹ/ instead of /ㄱ/ or /ㅂ/, which is assumed to be the process of converging into a standard language format under the influence of a standard speaker. The factor of change in this phenomenon is influenced more by external linguistic variables than by internal linguistic variables. In particular, the generation and academic ability variables were the largest among external linguistic factors, and the sub-dialect and gender did not affect this phenomenon. The Change of simplification of consonant cluster appeared faster in the younger generation, while older people appeared relatively slower. In addition, the higher the educational background, the faster the change appeared. What is important in the above results is that while the change in this phenomenon differs with the generation variables at its core, the direction of change is the same as "standard language-oriented" across generations.