In a robot failure symptom detection apparatus, a behavior time-sequence data acquisition unit performs processing of acquiring behavior time-sequence data relating to a motor of a joint of a robot from a robot operation, for each data collection unit period. An evaluation value calculation unit calculates an evaluation value for the behavior time-sequence data. A representative evaluation value generation unit generates a representative evaluation value representing the evaluation values for each data collection unit period. A sequence processing unit generates a sequence including the representative evaluation values. A determination unit creates a determination model, based on an initial sequence during an initial operation of the robot. After the initial operation, the determination unit inputs determination data including data based on an robot operation after the initial operation into the determination model, and acquires atypicality of the determination data.