Purpose-This paper aims to examine the impacts of IT Capability and its four sub-dimensions on the firm competitiveness at the logistics sector. IT capabilities have four sub-dimensions as IT infrastructure, IT business experience, IT relationship resources and IT human resources. IT infrastructure capability refers to the combinate hardware, software, network resources and services. IT business experience, is an ability to unify IT strategy and business strategy. IT relationship resource, is a capability to compound IT functions with business units and IT resources. IT human resources stand for an organizational resource and capability. Methodology-The data was collected from the national industry of logistics service providers associated in the international forwarding associations UND by questionnaire method. 450 questionnaires were distributed, 428 of them was returned (a response rate of 95%). Findings-All data was analysed by SPSS programme. First of all demographic characteristics of the respondents were presented by the frequency analysis. Then correlation analyse was used and it was found significant and positive relationships among IT Capability, its four sub-dimensions and competitiveness. At last regression analyses were used. Conclusion-The results of analyses showed that a firm's IT capability and its sub dimensions have positive effects on competitiveness, as proposed for this study.