A brake apparatus is configured to execute a brake assist based on a collision risk representing a risk of a vehicle including the brake apparatus to collide with an obstacle, and an emergency operation level representing an emergency level of a brake operation by a driver. The brake apparatus includes a collision risk calculation unit configured to calculate the collision risk, a detection unit configured to detect the emergency operation level, a storage unit configured to store the emergency operation level detected by the detection unit when the collision risk is within a predetermined range, a threshold determination unit configured to determine a threshold for the emergency operation level based on the collision risk, and a brake assist unit configured to execute the brake assist based on a comparison between the emergency operation level stored by the storage unit and the threshold for the emergency operation level.