Connecting structure of multiple variable valve lift apparatus

A variable valve lift apparatus, comprising:

• a camshaft;
• a first cam forming portion and a second cam forming portion inserted with the camshaft to rotate together with the camshaft and be movable in a shaft direction of the camshaft, and having an upper cam and a lower cam;
• a valve opening and closing device actuated by the upper cam or the lower cam;
• a first moving unit and a second moving unit inserted with the camshaft and each movable together with the first and second cam forming portions;
• a first actuating unit and a second actuating unit that selectively move the first and second moving units in the shaft direction of the camshaft and are mounted on a mounting portion;
• a positioning unit connected with each of the first and second moving units, and having a first groove and a second groove;
• and
• a stopper unit mounted on the mounting portion, and selectively inserted into the first and second grooves to align the first and second cam forming portions.