There is no available instrument which determines teacher candidates' competences of web based collaborative learning. Our study has provided findings about teacher perceptions in Cyprus. This article describes the development, testing and application of a suitable instrument. Research data for the tests of reliability and validity was obtained from a sample of 300 teacher candidates from the education faculty of Near East University in 2010. The final version of Web based collaborative learning competence scale (WBCL - CS) includes dimensions seeking teacher candidates' feedback on two facets of the web based collaborative learning. Sub-dimensions are defined as,"Using and development of materials" and "Material sharing and communication". Validity has been established by the use of factor analysis. Internal consistency coefficient and reliability of the scale showed that this instrument can be used for the future studies. According to the results of this research teacher candidates exhibited above medium levels of competence towards web based collaborative learning. (C) 2011 Published by Elsevier Ltd.