This paper considers the problem of resource sharing among selfish nodes in wireless cooperative networks.In the system, each node can act as a source as well as a potential relay, and both nodes are willing to achieve an extra rate increase by jointly adjusting their channel bandwidth and power levels for cooperative relaying.Nash bargaining solution (NBS) is applied to formulate the JBPA problem to guarantee fairness.Simulation results indicate the NBS resource sharing is fair and the fairness of resource allocation only depends on how much contribution its partner can make to its rate increase.