Based on Albert Bandura's Self-Efficacy Theory, this survey study was conducted to examine general education teachers' self-efficacy in inclusive teaching and the factors that influenced their self-efficacy. The survey results from 42 elementary and middle school teachers revealed that they were generally confident in teaching special education students although they were uncertain about their abilities to perform specific inclusive teaching tasks. Contrary to the investigator's hypothesis, the elementary school teachers in this study had higher self-efficacy in inclusive teaching than the middle school teachers. A positive correlation was found between the teacher's self-efficacy level and prior training in inclusion, supporting the idea that prior training helps improve teachers' self-efficacy. Perceived administrative support was also found to be a variable that influenced teachers' self-efficacy.