The present invention belongs to a technical field related to a composite optical element including a first optical component and a second optical component coupled to the first optical component. In a composite optical element 1 including a first optical component 10 and a second optical component 20 coupled to the first optical component 10, shape accuracy of the second optical component 20 is improved to prevent reduction in optical performance. A ring member (106) is placed on a peripheral portion of a lens surface (10b) of the first optical component (10), the ring member (106) having a height hi from the lens surface (10b) substantially uniform in a circumferential direction of the first optical component (10).