To provide a light-emitting element having a light-emitting layer of improved crystallinity and easy for mass production and a manufacturing method of the light-emitting element.

A light-emitting element manufacturing method comprises: a step of crystal growing a laminate including an etching easy layer adjacent to a first substrate composed of a III-V compound semiconductor and a light-emitting layer composed of a nitride-based semiconductor on the first substrate; a step of forming a transparent electrode and a first metal layer on the laminate in this order; a step of bonding a surface of a second metal layer provided on a second substrate with a surface of the first metal layer by heating the first and second metal layers in a stuck state; and a step of separating the first substrate and the second substrate on which the light-emitting layer is provided by removing the etching easy layer by use of solution etching or removing the etching easy layer by use of mechanical polishing.