Passenger protecting device

In order to provide a passenger protecting device having a configuration for preventing damage of a bag disposed underneath a cushion due to friction between a seat cushion and the bag, or the like, a passenger protecting device 10 is provided, which includes a bag 12 disposed underneath the front portion of a seat cushion 9, a gas generator 14A for inflating the bag 12, a bag envelope 34' disposed so as to surround the bag 12, a cover 100 for covering the aforementioned components. A seat pan 8 disposed underneath the seat cushion includes a recessed portion 20' on the upper face thereof, and the bag 12, the gas generator 14A, and the bag envelope 34', are disposed within the recess 20. The cover 100 is disposed so as to cover the recess 20. The bag 12 is held to the cover 100 by a holding member 110.