To provide a simple excrement holder for loading and bringing back a bag containing dog dirt on the outside of a vehicle.

The excrement holder 100 is provided, which is provided with a flexible base seat 1; a magnet 2 for fixing it to the vehicle; a grasping part 3 for grasping the bag containing the dog dirt; and a net 4 for preventing the bag from being shaken accompanying with shaking of the vehicle. Since the base seat is flexible, it can be easily mounted even to a curved part such as a rear part of the vehicle. By using the excrement holder 100, the bag containing the excrement such as dog dirt can be transported while fixing it to the outside of the vehicle without bringing into the vehicle.