Welded structures such as other engineering pieces need inspection in different levels which are before building, during building and after building. Welding inspection can necessarily assure employer from doing the work according to the standard instructions. To ensure from the goodness of welding and its conformity with the design needs, every effective factors in welding in different levels of performance must be inspected. Since welding connections in buildings and pieces is of the great importance in terms of sustainability, assurance and safety it is too important to ensure from their quality and is one the main concerns of builders and customers of these buildings and pieces. In welding inspection training course, all items and principals of this important task for a professional welding inspector will be describing and teaching. This training course is equal to 98 training hours.