A misfire detection device includes an electronic control unit that calculates, based on a crank signal, a first component that is a first integer multiple frequency component of a combustion cycle related to a rotation change value and a second component that is a second integer multiple frequency component of the combustion cycle related to the rotation change value. The electronic control unit determines whether the second component has a maximum value or a minimum value in at least one of two phases of a phase where the first component has a maximum value and a phase where the first component has a minimum value. The electronic control unit determines that an interval between compression top dead centers of cylinders has continuous misfire based on a determination result of whether the second component has a maximum value or a minimum value.