To provide a hanger spring device which requires less care for maintenance in hanging of a supported body.

This hanger spring device comprises a pair of U-shaped rods 50 and 60 structured of a pair of seat plates 10 and 20 respectively having a slide hole, straight line parts 52 and 62, and a curved parts 51 and 61. The pair of seat plates 10 and 20 are arranged in nearly parallel with each other, and the straight line parts 52 and 62 of the U-shaped rods 50 and 60 are passed through the slide holes from outside freely to move forward and backward, and tips thereof are fixed to the opposite seat plates 10 and 20, and a compression spring S is fitted on the straight line part 52 and 62 of the U-shaped rods 50 and 60 between the pair of seat plates 10 and 20 freely to be compressed.