This research deals the concept of customer's trust on the website. Through the link at the initiative client and its contribution to improving the marketing data- base. in order to ensure the flow of a modern and fast data and information from various sources, and makes the customer's trust in website a strategic goal ensures to organization the existence of data-bases constantly updated and valid to take a decisions more effective and rational, and the building of acts marketing more effective and memorable. The study concluded a series of important results are as follows: The existence of a statistically significant relationship between the customer's trust with website and the degree of contribution of the customer to improve the marketing data-bases. the independent variables consisting of the customer's trust with website (a sense of security in electronic transactions, privacy on the Website, Website design) combined 95% of the variance of the dependent variable on the customer's contribution to improve the marketing data-bases.