The thesis describes the importance of electronic business and B2B business in the company Astraprom d.o.o. Nowadays, e-business is indispensable for business operations. Information and communication technologies and information systems are becoming a strategic weapon of the company on which the future and success of business depend. E-business greatly changes the competitive advantage of companies in all industries. Nowadays, it is almost impossible to find a company that does not use at least internet search and email services for its business. If a company wants to be active in the market and achieve a competitive advantage, it must follow and accept new trends and adapt to change while constantly learning, educating and developing and satisfying its customers. Astraprom d.o.o. attaches special importance to new forms of technology. The company's management believes that the future of business lies in e-commerce and e-marketing, and that we should turn to this form of business, in order to further increase competitive advantage. The company is currently in the very beginnings of the implementation of e-commerce in its business and collects positive and negative impressions of its customers and business partners. The thesis describes the current B2B business in the company Astraprom d.o.o. and the company's "steps" to make B2B business easier and enable its customers to order products faster, easier and more efficiently with faster circulation of information, and easier and more productive work for employees.