I. IntroductionIn today's environment more and more B2B companies have become international, because they want to compete in an increasingly global market. This will increase their profitability in ways not available to domestic businesses alone. With the addition of operating region comes the challenge of managing company operations in multiple countries and coordinating the company's marketing activities in more than one nation. However, for many marketers, selling products and services in their own country is easy compared to the efforts required to increase sales in other countries. So in this essay I will discuss the unique challenges of Business 2 Business (B2B) in international marketing, which will improve the chances of success in this type of marketing.II. International MarketingA company that wants to be international should generally be modified and adapted to foreign markets. Therefore, in any foreign nation, the company is likely to find a combination of marketing environment and target markets that are different from those in its home country and other foreign countries. Before that we should know that marketing can be defined as “the process of finding out what people need and want, then producing a product or service that meets those needs and wants, and doing better than the competition”. On the other hand, international marketing can be "marketing activities in which a company reduces dependence on intermediaries and establishes direct involvement in the countries where trade occurs." There are many benefits to marketing a company's products or services globally, but the decision To go international must be careful, because there are many problems or challenges that companies may face in going international. However, the advantages of being international are: Increased sales and profits with additional revenues. Development of international trade technology. Reduce dependence on existing markets. New approach to consumer behavior. Distribution strategies alternatives.III. Unique challenges of international B2B1 marketing. Distance Lack of face-to-face connection/interaction Difficult to build rapport (personal relationships) World time zone differences Different working days/weekends Increasing reliance on technology for effective global communication Postal delays and courier costsOne of the challenges most difficult of international marketing is distance, because companies should take care of the above factors to succeed internationally without mistakes.2. Lack of knowledge of destination country Country geography and distances. Transportation costs Language barriers Preferred agents or distributors Competitor activities Countries are different from each other and their locations are more suitable than others for business.