An apparatus (100) for determining an attention requirement level of a driver of a vehicle is provided, which comprises a first signal processing unit (101), a second signal processing unit (104), a third signal processing unit (107), a fourth signal processing unit (110), and an attention requirement determination unit (113), connected to the first, second, third and fourth signal processing unit (101, 104, 107, 110) and configured to determine an attention requirement level (114) as a function of current values of the first, second, third and fourth attention requirement parameters (103, 106, 109, 112). In addition, a vehicle (200) having such an apparatus (100) and an operating method (300) for the apparatus (100) are provided.