Elevating apparatus of treadmill

An elevating apparatus of a treadmill, which connecting a frame and a table assembly of the treadmill, comprising

• a driving device provided at a bottom side of the table assembly to provide a reciprocating driving power;
• a transverse shaft having a pivot portion thereof to be pivoted on the driving device;
• two first linkages, each of which has a first pivot portion, a second pivot portion and a third pivot portion, wherein the first pivot portions and the second pivot portions are located at opposite ends of the first linkages to be fixed on the table assembly and ends of the transverse shaft respectively, and the third pivot portions are located between the first pivot portions and the second pivot portions respectively, and
• two second linkages having opposite ends pivoted on the frame and the table assembly respectively, each of which has a pivot portion between the ends thereof to be pivoted on the first linkages at the third pivot portions respectively.