Children are the beauty of human life and scholars discussed about them often . Again it is time to speak about them and try to reunderstand of this part of life. While talking about the child labor, we should consider those activitis that children are engaged unpaid or low paid. Effect of such activities on their future is crucial. This paper after giving few definitions, and mentioning the related laws in this respect in Iran, will give some examples of child labor worldwide. Then on the base of existing data the child labor in Iran specially carpet weaving in rural areas its, causes and effects on family economy in those areas will bedescussed. Some suggestion will be given in at the end.