In recent times, „Blended Instruction‟ - an effective method of instructions utilizing e-Learning materials in English education - consists of an individual learning part, a collaborative learning part and a teacher instruction part. In the individual learning, students act out model dialogues in the WBT courseware which incorporated a high quantity of video and sound clips. In the collaborative learning, students perform the dialogues in pairs and assessed each other‟s performance. Our recent research in a high school showed that the skill of the students‟ oral reading was improved in most criteria of assessment through blended instruction. However, it is still not clear what kind of relationship exists between the development of the students‟ oral reading skills and their personalities. With this in mind, the authors have studied the effects of the blended instruction on the junior high school students‟ oral reading performance and their relationships to the five-factor model of personality. The result of the research shows that the skill of the students‟ oral reading was improved in most criteria of assessment and the blended instruction was effective for the personality group, „Introverted unintelligent person‟ in the most categories of oral reading criteria as well as the personality group, „Sociable hard-worker‟. The important factor for that group in oral reading performance turned out to be „Sense Reading‟. | The effects of blended instruction on oral reading performance and their relationships to a five-factor model of personality