An information processing device collects information used for analyzing communication performed in an in-vehicle network by ECUs including an ECU which performs predetermined control related to a function of an ADAS. The information processing device includes a receiver, a determiner, and a processor. The receiver receives a plurality of items of communication data sequentially transmitted over the in-vehicle network. The determiner detects a control end time which is a time at which the predetermined control ends, and determine an analysis target period including the control end time. The processor classifies the plurality of items of communication data received by the receiver into analysis target communication data received within the analysis target period and non-analysis target communication data received outside the analysis target period. The processor further performs predetermined processing for analysis of the analysis target communication data based on the classification result.