The present study was designed to investigate the needs of competencies perceived by teachers of special education for their continuing professional development, and has attempted to construct the curriculum context for the teacher INSET training. Sixty topic-type competency statements representing basic domains of professional competencies, which were categorized in- to eight kinds of professional competency areas: Foundation Knowledge of Special Education, Curriculum Development, Teaching Strategies, EduPsychological Assessment, Guidance and Be haviour Management, Health and Medical Care, Communication skills, and Parents Education. The analysis was based on the ratings of importance and acquirement of the competencies to find out the priorities in each professional area and competency which is needed to be developed in the future teacher training. A total of 88 special education teachers who are part-time postgraduate students in NTNU, were surveyed as subjects. A Likert-type questionnaire "Professional Competencies Inventory for Special Education Teachers" was conducted. The results indicated that two kinds of profession- al competency areas, Curriculum Development and EduPsychological Assessment, were regarded as priorities in the continuing professional development for special education teachers. In addition, based on the analysis of sixty professional competencies, a three levels of competency- based INSET training course for special education teachers was suggested.