A micromirror device comprising: a mirror portion having a reflecting surface for reflecting incident light; a pair of first support portions that are connected to the mirror portion on a first axis (a 1) located in a plane including the reflecting surface of the mirror portion in a stationary state, and that swingably support the mirror portion around the first axis (a 1); a pair of movable frames that are connected to the first support portion and face each other across the first axis (a 1); a pair of second support portions that are connected to the movable frame on a second axis (a 2) which is located in the plane and is orthogonal to the first axis (a 1), and that swingably support the mirror portion, the first support portion, and the movable frame around the second axis (a 2); a driving portion that surrounds the movable frame; a fixed frame that surrounds the driving portion; a pair of connecting portions (26A, 26B) that have a thinner thickness than the fixed frame and stretch along the first axis (a 1) or the second axis (a 2) to connect the driving portion and the fixed frame; and four piezoelectric sensors (51, 52, 53, 54) each of which is formed of an upper electrode, a piezoelectric film, and a lower electrode, in which a shape and a position of the upper electrode are in a line-symmetrical relationship about the first axis (a 1) and the second axis (a 2), wherein, in a case where a stretching direction of the connecting portion (26A, 26B) is a first direction, a direction orthogonal to the first direction and located in the plane is a second direction, and a length of a boundary between the fixed frame and the connecting portion (26A, 26B) in the second direction is denoted by H, at least a part of each of the four piezoelectric sensors (51, 52, 53, 54) is within a range of H/2 in the second direction from an axis parallel to the first direction, out of the first axis (a 1) and the second axis (a 2), and is disposed on the fixed frame. a mirror portion having a reflecting surface for reflecting incident light; a pair of first support portions that are connected to the mirror portion on a first axis (a 1) located in a plane including the reflecting surface of the mirror portion in a stationary state, and that swingably support the mirror portion around the first axis (a 1); a pair of movable frames that are connected to the first support portion and face each other across the first axis (a 1); a pair of second support portions that are connected to the movable frame on a second axis (a 2) which is located in the plane and is orthogonal to the first axis (a 1), and that swingably support the mirror portion, the first support portion, and the movable frame around the second axis (a 2); a driving portion that surrounds the movable frame; a fixed frame that surrounds the driving portion; a pair of connecting portions (26A, 26B) that have a thinner thickness than the fixed frame and stretch along the first axis (a 1) or the second axis (a 2) to connect the driving portion and the fixed frame; and four piezoelectric sensors (51, 52, 53, 54) each of which is formed of an upper electrode, a piezoelectric film, and a lower electrode, in which a shape and a position of the upper electrode are in a line-symmetrical relationship about the first axis (a 1) and the second axis (a 2), wherein, in a case where a stretching direction of the connecting portion (26A, 26B) is a first direction, a direction orthogonal to the first direction and located in the plane is a second direction, and a length of a boundary between the fixed frame and the connecting portion (26A, 26B) in the second direction is denoted by H, at least a part of each of the four piezoelectric sensors (51, 52, 53, 54) is within a range of H/2 in the second direction from an axis parallel to the first direction, out of the first axis (a 1) and the second axis (a 2), and is disposed on the fixed frame.