An instrumental device is provided which includes a variable display portion and a pointer moving around the variable display portion and achieves excellent response and resistance to vibration without complicating the shape of a member. The instrumental device has a display plate 21 having a variable display portion 21b, a pointer 23 moving around the variable display portion 21b, and pointer drive means 25, 26 provided on the back-face side of the display plate 21 for moving the pointer 23. The instrumental device includes a guide rail portion 22 provided in the display plate 21 to surround the periphery of the variable display portion 21b, the pointer 23 being located on the guide rail portion 22, a holding portion 24 holding the pointer 23 movably along the guide rail portion 22, a first magnet 24c provided in the pointer 23 or the holding portion 24, and a second magnet 25a provided in the pointer drive means 25, 26 such that the second magnet 25a is opposite to the first magnet 24c, wherein the pointer 23 is rotated in association with rotation drive of the pointer drive means 25, 26 by attraction force of the first and second magnets 24c, 25a.