Driving assistance device

A driving assistance device comprising:

• an in-vehicle sensor for acquiring information on an object positioned forward of a host vehicle;
• and
• a processor configured to execute a deceleration assist process of braking the host vehicle in a case where a preceding vehicle is present and a first condition for determining that there is a high possibility that the host vehicle excessively approaches the preceding vehicle is satisfied, and a collision risk reduction process of controlling the host vehicle such that a collision risk between the host vehicle and the preceding vehicle is reduced in a case where a second condition that is a condition for determining that the collision risk is high is satisfied, and end execution of the deceleration assist process in a case where the first condition is not satisfied or the second condition is satisfied during the execution of the deceleration assist process,
• wherein the processor is configured to end the execution of the deceleration assist process and execute a condition relaxation process of relaxing the second condition, in a case where a speed of the host vehicle decreases and reaches a threshold value due to continuation of the deceleration assist process under a situation in which a state where the first condition is satisfied and the second condition is not satisfied is maintained.