To provide a pipe structure with a shelf part which can be flipped up.

The pipe structure has back supports 4 and 4 on the back face. The back supports are linked together by a back side beam 14 at the height position of a base shelf part 10. The frame of the base shelf part 10 is formed by arm members 11 and 11 of the base shelf part whose back side ends are linked to the back side beam in such a way as rotatable in the vertical direction, front supports 12 and 12 attached to the arm members in such a way as rotatable in the vertical direction, and a front beam 13 linking upper ends of the front supports. The back supports are linked by a back side beam 24 at the height position of an upper-stage shelf part 20 higher than the base shelf part 10, and the frame of the upper-stage shelf part 20 is formed by arm members 21 and 21 of the upper-stage shelf part whose back side ends are linked to the back side beam material in such a way as rotatable in the vertical direction, upper-stage front supports 22 linking front ends of the arm members to the corresponding arm members of the base shelf part 10 in such a way as rotatable in the vertical direction, and an upper-stage front beam 23 linking upper ends of the front supports of the upper-stage shelf part.