The present paper describes the development and validation of a new instrument designed to explore English language teaching (ELT) student teachers' beliefs about Intercultural Communicative Competence (ICC) in an expanding-circle context, Turkey. The process of instrument development and validation is described along with a concise literature review of ICC. Forty-eight items were prepared based on a comprehensive review of literature. 34-item instrument was developed following two phases: First, an exploratory factor analysis of the responses of a large sample (N=399) of ELT student teachers, and then a subsequent confirmatory factor analysis with another large but different sample (N=378) were performed. The Kaiser-Meyer Olkin (KMO) coefficient was found as 0.90 and the Bartlett test result (Chi- Square 3613.58; p<0.01) was found significant. The results of the analysis indicated that the inventory has a perfect reliability value with 0.925, resulting in 34 items. The four factors that emerged from the exploratory factor analysis are attitudes, knowledge, awareness and skills. The result of confirmatory factor analysis indicated that GFI = 0.93, AGFI = 0.73, CFI = 0.77, NNFI = 0.93, RMSEA (90% CI) = 0.076 (0.041-0.086) and SRMR = 0.046. Based on these findings, the study provides suggestions with regard to the potential uses of the Beliefs about Intercultural Communicative Competence Inventory (BICCI) in second language teacher education.