The present investigation validated a short form of Career Development Self-Efficacy Inventory (CD-SEI) in students with a wide range of special educational needs (SEN). Participants were a sample of S3 to S6 SEN students who have been integrated in regular schools in Hong Kong (N =103). The SF-CD-SEI consists of five key domains to assess students' self-efficacy in career planning, career goal setting, training selection, job hunt preparation, and job hunting. The results showed good reliability estimates for the whole scale and for all five sub-scales. Based on previous research on validating the complete CD-SEI, a series of confirmatory factor analyses (CFA) were performed to test three competing models of the internal structure of the SF-CD-SEI. The results showed the high order model (model 3) had the best model fit compared to one general factor model (model 1) and five-factor model (model 2). These findings were consistent with those identified in previous studies with non-SEN students. The SF-CD-SEI provides researchers, educators and practitioners a useful instrument to assess SEN students' competences in career planning in order to develop self-efficacy enhancement interventions to cater for these students' career development needs.[Copyright © 2015 The Special Education Society of Hong Kong Ltd.]