Bag with caster wheels

A bag with caster wheels comprising:

• a base frame having caster wheels which are free to swivel in any direction, at four corner regions of a bottom surface thereof;
• and
• a main bag mounted on this base frame,
• the base frame comprising:
• a stand provided with the caster wheels at the four corner regions thereof and mounting the main bag thereon;
• telescopic rods which are joined on one side of this stand or between both sides in an upward-extending position so as to stand on their own and which can be freely extended upward and are provided with a grip at upper ends thereof;
• and
• stoppers for stopping the telescopic rods at an extension position,
• wherein the main bag is joined to the telescopic rods on a side surface thereof, and the stand has supporting cylinders into which the telescopic rods are inserted to be joined, these supporting cylinders being arranged between the caster wheels provided at the four corners of the stand and being projected in a lower surface of the stand so that a projection height is made lower than a height of the caster wheels, and further, reinforcement walls joined to the lower surface of the stand are joined to lower surface projection parts of the supporting cylinders so as to reinforce the supporting cylinders for joining the stand, and lower ends of the telescopic rods are joined to these supporting cylinders.