Cloud computing is one of the most prominent word of today’s promising technology. The main reason for the success of cloud computing is to create trust between cloud provider and cloud consumer. Trust is the important factor in cloud computing and it is mostly depending on observation of reputation and the self assessment by cloud providers. There are various actors involved in cloud environment such as cloud service provider,cloud consumer,cloud broker,cloud auditor and cloud carrier. Every service provider has their own features and behaviors. In this paper we propose an architecture for reputation based trustworthy system which provides the trust between customer and provider. It contains a trust evaluator which calculates the trust on various service providers based on the customer feedback and quality of service such as data handling. The calculated trust value is updated dynamically on database and finally the ratings of service providers will be displayed based on customer’s feedback. © 2016,International Journal of Pharmacy and Technology. All rights reserved.