This study aims at proposing the English pronunciation cores for Korean learners of English who use English as a Lingua Franca. First, the ELF pronunciation cores proposed in previous studies were examined throughly to find out whether the cores need to be added or subtracted to meet the needs of Korean learners. The four common cores proposed by Jenkins(2000) should also be the cores for Korean learners and the word stress proposed by Walker(2010) needs to be included in the cores considering the key roles of word stress in EIL communication settings. The revised common cores which includes word stress will be utilized in English pronunciation learning and teaching for Korean learners of English including pre-service teachers.