They met with Spanish investors at a conference organized by Madrid's Chamber of Commerce and discussed areas of potential growth between the two countries.
"Iran has more to offer to Spanish investors than just oil and gas. We have organized this event to promote trade and investment opportunities in banking, housing, and infrastructures as well, and make it easier for businessmen to start up in Iran," the vice president of Madrid's Chamber of Commerce, Miguel Corsini said in his address to the meeting.
Oil and gas trades account for most of the economic cooperation between Tehran and Madrid. Spain is among the main buyers of Iran's crude oil, and 15 percent of the country's oil imports are from the Islamic Republic.
Spanish private sector has also expressed readiness to invest in the Iranian energy sector.
There are more than 1,500 Spanish companies working in different sectors including electricity generation and renewable energy in Iran.