The fluid-driven electrical generator utilizes internal driven fluid currents to generate a regular, mechanical oscillation that is used to generate electricity through electromagnetic induction. The fluid-driven electrical generator includes a base having opposed upper and lower surfaces. A linearly oscillating disc having opposed upper and lower surfaces and having a central passage formed therethrough is resiliently supported above the base to form a lower fluid flow path therebetween. An upper housing is mounted above the upper surface of the linearly oscillating disc. A lower surface of an upper wall thereof is spaced apart from the upper surface of the linearly oscillating disc to form an upper fluid flow path therebetween. At least one permanent magnet is attached to an outer edge of the linearly oscillating disc for generating alternating electrical current in at least one induction coil mounted adjacent the at least one permanent magnet.