A suspension device interposed between a vehicle body and a wheel, comprising: a shock absorber in which an operating fluid is sealed therein including a cylinder, a piston rod going into and out of the cylinder, a piston held by the piston rod and defining two chambers (r1, r2) formed in the cylinder, where the operating fluid is filled in the two chambers (r1, r2), and a passage formed in the piston and allowing the two chambers (r1, r2) to communicate with each other; a suspension spring made of a coil spring adapted to urge the shock absorber in an extension direction; a tube member composed of an outer tube and an inner tube going into and out of the outer tube and adapted to accommodate the shock absorber and the suspension spring; a sealing member adapted to close a one-side opening of the tube member and to hold the piston rod; a damping force adjustment portion adapted to electrically adjust resistance caused when the operating fluid passes through the passage; and a reaction force adjustment portion adapted to adjust a reaction force of the suspension spring, wherein the operating fluid is a magnetic viscous fluid whose viscosity changes by an action of a magnetic field; the damping force adjustment portion includes a coil mounted on the piston and adapted to generate the magnetic field in the passage and a wiring adapted to penetrate the piston rod and the sealing member and to conduct the coil; the sealing member is formed annularly and includes a sealing portion screwed with the tube member, a guide portion extending from the sealing portion to a tube member side and having an opening (41a, 41b) on a side portion, and a rod holding portion extending from the guide portion to the tube member side and adapted to hold the piston rod; and the reaction force adjustment portion is mounted on the sealing member and includes an annular adjuster screwed with an inner periphery of the sealing portion, a cylindrical wiring guide inserted into an inside of the adjuster, and a support piece inserted into the guide portion and driven in an axial direction by the adjuster; the wiring passes inside the cylindrical wiring guide; the cylindrical wiring guide extends to the rod holding portion and is fixed to the rod holding portion; and the support piece includes a support portion protruding from the opening (41a, 41b) of the guide portion to an outer side and adapted to support a one-side end portion of the suspension spring by the support portion. a shock absorber in which an operating fluid is sealed therein including a cylinder, a piston rod going into and out of the cylinder, a piston held by the piston rod and defining two chambers (r1, r2) formed in the cylinder, where the operating fluid is filled in the two chambers (r1, r2), and a passage formed in the piston and allowing the two chambers (r1, r2) to communicate with each other; a suspension spring made of a coil spring adapted to urge the shock absorber in an extension direction; a tube member composed of an outer tube and an inner tube going into and out of the outer tube and adapted to accommodate the shock absorber and the suspension spring; a sealing member adapted to close a one-side opening of the tube member and to hold the piston rod; a damping force adjustment portion adapted to electrically adjust resistance caused when the operating fluid passes through the passage; and a reaction force adjustment portion adapted to adjust a reaction force of the suspension spring, wherein the operating fluid is a magnetic viscous fluid whose viscosity changes by an action of a magnetic field; the damping force adjustment portion includes a coil mounted on the piston and adapted to generate the magnetic field in the passage and a wiring adapted to penetrate the piston rod and the sealing member and to conduct the coil; the sealing member is formed annularly and includes a sealing portion screwed with the tube member, a guide portion extending from the sealing portion to a tube member side and having an opening (41a, 41b) on a side portion, and a rod holding portion extending from the guide portion to the tube member side and adapted to hold the piston rod; and the reaction force adjustment portion is mounted on the sealing member and includes an annular adjuster screwed with an inner periphery of the sealing portion, a cylindrical wiring guide inserted into an inside of the adjuster, and a support piece inserted into the guide portion and driven in an axial direction by the adjuster; the wiring passes inside the cylindrical wiring guide; the cylindrical wiring guide extends to the rod holding portion and is fixed to the rod holding portion; and the support piece includes a support portion protruding from the opening (41a, 41b) of the guide portion to an outer side and adapted to support a one-side end portion of the suspension spring by the support portion.