To provide an automatic photographic processing device and an automatic density measuring method by which photographically processed paper for setup is automatically discriminated and distributed, and then it is carried to a densitometer to automatically measure a color developed state and the like and a processing condition is automatically corrected based on the measured result in setup operation.

This device is an automatic photographic processing device for automatically performing photographic processing to photographic sensitive material and a sample for setup as a series of stages, and it is equipped with the densitometer 2, a carrying means 3 carrying the sample for setup to the densitometer 2, and a setup means 4 automatically setting and correcting the photographic processing condition based on the measured result on the density of the sample for setup. Then, the density of the sample for setup is automatically measured by using the device.