PROBLEM TO BE SOLVED: To evaluate and generate an automatic braking algorithm considering the influence on a rear vehicle. A braking evaluation device 30 having a computer has a temporary braking pattern holding unit 310 that holds a virtual automatic braking pattern (hereinafter, temporary braking pattern) in a target vehicle, and a virtual target vehicle and a rear vehicle before braking. When the braking is completed, the target vehicle is said to be the target vehicle, which is derived from the combination of the pre-braking temporary rear inter-vehicle distance holding portion 320 for holding the typical inter-vehicle distance information (hereinafter, the inter-vehicle distance before braking), the pre-braking temporary rear vehicle distance and the temporary braking pattern. A post-braking temporary collision impact holding unit 330 for holding information on the impact of being hit by a vehicle behind is provided. [Selection diagram] Fig. 3
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