One embodiment of the present invention is a manufacturing method of an organic electroluminescent device, the method including: forming a first electrode on a substrate; forming an organic luminescence media layer over the first electrode which emits light by applying a voltage wherein the organic luminescence media layer includes a hole transport layer and an organic luminous layer; and forming a second electrode on the organic luminescence media layer, wherein the method further includes: forming the hole transport layer by applying a polymeric hole transport material, and further forming the organic luminous layer on the hole transport layer by applying an ink including 0.3% by weight 3% by weight of a low molecular organic luminous material having a molecular weight less than or equal to 5000 Daltons.