The point of this thesis work was to make a research and describe ways of increasing the share capital of Joint-stock company. Any decision for the increase of the founding capital should be without changing the articles of association. The share capital may be increased by increasing the capital against contributions, increase in conditional capital, authorized capital and increase in share capital from company funds. The increase of share capital against contributions is one of the effective ways of increasing the share capital of the company's foundings. The increase of share capital against contributions is only possible by issuing new foundings, and not by increasing the existing nominal founding. The share capital is considered to be increased on the day of the increase was made. Conditional increase in share capital was named because of the fact that before making a decision for the increase, it can not be said whether and for how long it will really be the founding capital rise. It depends on the people who are authorized to acquire foundings on the basis of this increase in founding capital and their willingness to actually acquire the foundings. Furthermore, the general meeting may take a decision that authorizes the government to a particular time to increase the share capital up to an amount. This is called the authorized share capital. The fourth way is that the general meeting may decide to increase the company's capital by converting capital profit, reserves and retained earnings in the company's capital. This increase can be realized without additional payments to the company, but with using the existing own sources of the company converted into equity account for the assets of the company.