A Wireless Sensor Network (WSN) consists of spatially scattered self-directed sensors to agreeably monitor physical or ecological conditions, such as temperature, sound, vibration, pressure, motion or pollutants. Trust in networks may be defined as the degree of belief or confidence about the nodes on the past interactions and observations. So trust becomes a major issue for reliable communication in WSN under constraints. We propose a trust worthy framework for WSN that considers challenges of the system and focus on the collaborative mechanism for trust evaluation.