PURPOSE: To solve uselessness to shorten length of a panel and to well perform adhesion by forming recessed parts for injecting an adhesive to the facing end parts of panel elements, when a panel is manufactured by adhering a plurality of panel elements at the facing end parts.

CONSTITUTION: Panel elements 2 are carried in the arrow mark 4 direction by means of a roller conveyer in an apparatus main body 1. By the way, the panel elements 2 are carried in a mold 5 consisting of top and bottom both mold parts 7 and 6 to mutually connect a plurality of panel elements 2 at opposite bonding faces 9. Then, from continuous strings of the panel elements 2, panels 11 with a specified length is cut out by a cutting means 12. In this case, recessed parts 14 with a required shape are formed in advance on end faces 13 of the panel elements 2. In addition, under a condition where the mold 5 is closed, an adhesive is injected into the recessed parts 14 from a nozzle 21 through an injection channel 16. It is possible thereby to solve uselessness to shorten length of the panel 11 and to well perform adhesion.