1. A biometric authentication device comprising: a memory; and a processor coupled to the memory and the processor configured to execute a process, the process comprising: extracting a finger crotch from a palm image for comparison; extracting a finger root wrinkle from the palm image for comparison; adjusting at least one of a position of a biometric feature for comparison of the palm image for comparison and a position of an enrollment biometric feature of an enrolled palm image, based on position information of the finger crotch extracted in the extracting of the finger crotch and position information of the wrinkle extracted in the extracting of the finger root wrinkle; and comparing the biometric feature for comparison and the enrollment biometric feature after the adjusting.