A drive device for an optical disc apparatus, wherein the tooth comprises a tooth body fixed to an optical pickup, two support pieces projecting from the tooth body toward a lead screw, two resin spring pieces provided with a base part on the projecting end of each of the support pieces and extending in a direction orthogonal to the axial direction of the lead screw, a plate part having a base part on the extending ends of the resin spring pieces and formed in a direction parallel to the axial direction of the lead screw, meshing cogs formed on the plate part on the side near the lead screw, and a linking part formed across the space between the resin spring pieces.