To provide a tennis ball collector with which tennis balls dispersed around a court can be speedily and easily collected while using a tennis ball collecting instrument with one hand and using a racket with the other hand.

A supporting pole 6 is provided at the upper part of a main pole rod 1, a bag-shaped collection net 8 is provided on a rectangular pole frame 3 at the lower part of the main pole rod 1, a ball take-out port 7 to be freely opened/closed is provided at the rear part of the bag-shaped collection net 8, and casters 4 and 5 are mounted on the left and right sides of section of the pole frame 3 in contact with the ground.