A micromirror device that has a mirror part having a reflecting surface which reflects incident light and that changes two-dimensionally an orientation of the reflecting surface by reciprocally rotating the mirror part about two axes of a first axis and a second axis intersecting each other, the micromirror device comprising: a first actuator that has first piezoelectric elements (41, 42) disposed in an annular shape around the mirror part, the first actuator being connected to the mirror part and reciprocally rotating the mirror part about the first axis by periodically deforming the first piezoelectric elements (41, 42); and a second actuator that has second piezoelectric elements (44, 46), the second actuator reciprocally rotating the mirror part about the second axis by periodically deforming the second piezoelectric elements (44, 46), wherein assuming that a resonance frequency in a lowest-order resonance mode as a resonance mode, in which the mirror part and the first actuator reciprocally rotate about the first axis in opposite phases with each other, among a plurality of resonance modes having different resonance frequencies is A, a resonance frequency in a lowest-order resonance mode as a resonance mode, in which the mirror part and the first actuator oscillate in opposite phases in a direction orthogonal to both the first axis and the second axis, among the plurality of resonance modes, is B, a difference A-B between the resonance frequency A and the resonance frequency B is a frequency difference F, a resonance frequency in a resonance mode having a resonance frequency of a frequency less than the frequency difference F as a resonance mode having a resonance frequency closest to the frequency difference F among the plurality of resonance modes is C, and a resonance frequency in a resonance mode having a resonance frequency of a frequency greater than the frequency difference F as a resonance mode having a resonance frequency closest to the frequency difference F among the plurality of resonance modes is D, a difference ΔF1 between the frequency difference F and the resonance frequency C satisfies Δ F1 = F − C ≥ 20Hz, a difference ΔF2 between the frequency difference F and the resonance frequency D satisfies Δ F2 = F − D ≤ − 150 Hz. a first actuator that has first piezoelectric elements (41, 42) disposed in an annular shape around the mirror part, the first actuator being connected to the mirror part and reciprocally rotating the mirror part about the first axis by periodically deforming the first piezoelectric elements (41, 42); and a second actuator that has second piezoelectric elements (44, 46), the second actuator reciprocally rotating the mirror part about the second axis by periodically deforming the second piezoelectric elements (44, 46), wherein assuming that a resonance frequency in a lowest-order resonance mode as a resonance mode, in which the mirror part and the first actuator reciprocally rotate about the first axis in opposite phases with each other, among a plurality of resonance modes having different resonance frequencies is A, a resonance frequency in a lowest-order resonance mode as a resonance mode, in which the mirror part and the first actuator oscillate in opposite phases in a direction orthogonal to both the first axis and the second axis, among the plurality of resonance modes, is B, a difference A-B between the resonance frequency A and the resonance frequency B is a frequency difference F, a resonance frequency in a resonance mode having a resonance frequency of a frequency less than the frequency difference F as a resonance mode having a resonance frequency closest to the frequency difference F among the plurality of resonance modes is C, and a resonance frequency in a resonance mode having a resonance frequency of a frequency greater than the frequency difference F as a resonance mode having a resonance frequency closest to the frequency difference F among the plurality of resonance modes is D, a difference ΔF1 between the frequency difference F and the resonance frequency C satisfies Δ F1 = F − C ≥ 20Hz, a difference ΔF2 between the frequency difference F and the resonance frequency D satisfies Δ F2 = F − D ≤ − 150 Hz. a resonance frequency in a lowest-order resonance mode as a resonance mode, in which the mirror part and the first actuator reciprocally rotate about the first axis in opposite phases with each other, among a plurality of resonance modes having different resonance frequencies is A, a resonance frequency in a lowest-order resonance mode as a resonance mode, in which the mirror part and the first actuator oscillate in opposite phases in a direction orthogonal to both the first axis and the second axis, among the plurality of resonance modes, is B, a difference A-B between the resonance frequency A and the resonance frequency B is a frequency difference F, a resonance frequency in a resonance mode having a resonance frequency of a frequency less than the frequency difference F as a resonance mode having a resonance frequency closest to the frequency difference F among the plurality of resonance modes is C, and a resonance frequency in a resonance mode having a resonance frequency of a frequency greater than the frequency difference F as a resonance mode having a resonance frequency closest to the frequency difference F among the plurality of resonance modes is D, a difference ΔF1 between the frequency difference F and the resonance frequency C satisfies Δ F1 = F − C ≥ 20Hz, a difference ΔF2 between the frequency difference F and the resonance frequency D satisfies Δ F2 = F − D ≤ − 150 Hz.