Problems about outsourced workers is quite varied. On the one hand A company got benefited enormously from the use of outsourced workers. But on the other hand can very disadvantaged outsourced workers of their rights, while the existing regulations have not been too inadequate to regulate outsourcing. This study attempts to seek legal issues associated with outsourcing are as follows. (1) How is the company doing the main job classifications (core business) and supporting the work of companies (non-core business) which is the basis of the implementation of outsourcing? (2) How is the implementation of outsourced work in the industry in Indonesia? (3) How does the model implementation outsourced employees in workers' welfare perspective? The study found that although the rules of support as a precondition demanding job outsourcing, but the determination of the type of work it is left entirely to the company. In fact, many companies hire outsourced workers in the production process (core business). While between the kind of work done was inversely with the income derived workers outsource. Therefore, this study argues that the strict rules against outsourcing is absolutely necessary to protect the rights of workers.