Bridge Data is a large multi-domain and multi-task dataset, with 7,200 demonstrations constituting 71 tasks across 10 environments. The dataset is collected using a low-cost yet versatile 6-DoF WidowX250 robot arm and contains 7,200 demonstrations of a robot performing 71 kitchen tasks across 10 environments with varying lighting, robot positions, and backgrounds. It can be used to boosting generalization of robotic skills and empirically study how it can improve the learning of new tasks in new environments.