A telescopic frame structure of the scooter includes: a rear frame body; a front frame body, disposed at the front end interval of the rear frame body; a telescopic connection frame is disposed between the front frame body and the rear frame body to be retractable and adjustable under force, so that the front frame body and the rear frame body are selectively reciprocally movable to change the total length of the telescopic frame structure of the scooter; and a limiting member comprises a front plate body and a rear plate body disposed above the telescopic connection frame, the front plate body and the rear plate body respectively have a front side and a rear side, wherein the front side of the plate body is pivoted to the rear edge of the front frame body through a first pivoting shaft member; the rear side of the rear plate body is pivoted to the front edge of the rear frame body through a second pivoting shaft member; the rear side of the front plate body is pivoted to the front side of the rear plate body through a third pivoting shaft member; when the telescopic connection frame is in an elongated state, the front plate body and the rear plate body are relatively interlocked by the third pivoting shaft member in flat rotary fulcrum state; wherein the axle center definition of the first pivoting shaft member forms a first pivoting axis, the axle center definition of the second pivoting shaft member forms a second pivoting axis, and the axle center definition of the third pivoting shaft member forms a third pivoting axis; and the connecting definition between the first pivoting axis and the second pivoting axis forms a virtual connecting axis, the virtual connecting axis is in an any state of horizontal line or approaching the horizontal line, and the virtual connecting axis corresponding to the third pivoting shaft member defines an intermediate line section and the height of the third pivot axis is lower than the height of the intermediate line section. a rear frame body; a front frame body, disposed at the front end interval of the rear frame body; a telescopic connection frame is disposed between the front frame body and the rear frame body to be retractable and adjustable under force, so that the front frame body and the rear frame body are selectively reciprocally movable to change the total length of the telescopic frame structure of the scooter; and a limiting member comprises a front plate body and a rear plate body disposed above the telescopic connection frame, the front plate body and the rear plate body respectively have a front side and a rear side, wherein the front side of the plate body is pivoted to the rear edge of the front frame body through a first pivoting shaft member; the rear side of the rear plate body is pivoted to the front edge of the rear frame body through a second pivoting shaft member; the rear side of the front plate body is pivoted to the front side of the rear plate body through a third pivoting shaft member; when the telescopic connection frame is in an elongated state, the front plate body and the rear plate body are relatively interlocked by the third pivoting shaft member in flat rotary fulcrum state; wherein the axle center definition of the first pivoting shaft member forms a first pivoting axis, the axle center definition of the second pivoting shaft member forms a second pivoting axis, and the axle center definition of the third pivoting shaft member forms a third pivoting axis; and the connecting definition between the first pivoting axis and the second pivoting axis forms a virtual connecting axis, the virtual connecting axis is in an any state of horizontal line or approaching the horizontal line, and the virtual connecting axis corresponding to the third pivoting shaft member defines an intermediate line section and the height of the third pivot axis is lower than the height of the intermediate line section.