A fluid dynamic bearing device, comprising: a bearing sleeve made of sintered metal; a rotary member comprising: a shaft portion inserted along an inner periphery of the bearing sleeve; and a hub portion expanding radially outward from one end of the shaft portion; a radial bearing portion configured to support the rotary member in a non-contact manner in a radial direction, the radial bearing portion forming a radial bearing gap between an inner peripheral surface of the bearing sleeve and an outer peripheral surface of the shaft portion opposed to the inner peripheral surface of the bearing sleeve along with rotation of the rotary member; and a thrust bearing portion configured to support the rotary member in a non-contact manner in one thrust direction, the thrust bearing portion forming a thrust bearing gap between one end surface of the bearing sleeve and an end surface of the hub portion (23a1) opposed to the one end surface of the bearing sleeve along with the rotation of the rotary member, wherein at least an outer peripheral surface of the bearing sleeve being subjected to pore sealing treatment, wherein a sealing gap for retaining an oil surface of lubricating oil is made along an outer peripheral surface (8d1) of one end of the bearing sleeve, and wherein a lid member having a bottomed cylindrical shape being fixed to an outer periphery of another end of the bearing sleeve. a bearing sleeve made of sintered metal; a rotary member comprising: a shaft portion inserted along an inner periphery of the bearing sleeve; and a hub portion expanding radially outward from one end of the shaft portion; a radial bearing portion configured to support the rotary member in a non-contact manner in a radial direction, the radial bearing portion forming a radial bearing gap between an inner peripheral surface of the bearing sleeve and an outer peripheral surface of the shaft portion opposed to the inner peripheral surface of the bearing sleeve along with rotation of the rotary member; and a shaft portion inserted along an inner periphery of the bearing sleeve; and a hub portion expanding radially outward from one end of the shaft portion; a radial bearing portion configured to support the rotary member in a non-contact manner in a radial direction, the radial bearing portion forming a radial bearing gap between an inner peripheral surface of the bearing sleeve and an outer peripheral surface of the shaft portion opposed to the inner peripheral surface of the bearing sleeve along with rotation of the rotary member; and a thrust bearing portion configured to support the rotary member in a non-contact manner in one thrust direction, the thrust bearing portion forming a thrust bearing gap between one end surface of the bearing sleeve and an end surface of the hub portion (23a1) opposed to the one end surface of the bearing sleeve along with the rotation of the rotary member, wherein at least an outer peripheral surface of the bearing sleeve being subjected to pore sealing treatment, wherein a sealing gap for retaining an oil surface of lubricating oil is made along an outer peripheral surface (8d1) of one end of the bearing sleeve, and wherein a lid member having a bottomed cylindrical shape being fixed to an outer periphery of another end of the bearing sleeve.