A collapsible shoe rack may include a plurality of shoe retaining members with two parallel side arms integrated with a horizontal arm as a single piece, and a plurality of connecting members with two parallel side arms and a horizontal arm. In one embodiment, the shoe retaining members are arranged in a reverse U-shaped manner in the shoe rack, and each of the shoe retaining members is connected with the connecting member. A locking member is disposed at the base of the shoe rack and pivotally connected to the base at one end, and the connecting member at the other end. The locking unit is configured to lock the entire structure of shoe rack to prevent it from collapsing.