With regard to a care bed provided with a three-dimensional net-like structure made of a thermoplastic resin, an object is to smoothly bend the three-dimensional net-like structure in multiple stages in response to a complicated motion of a bed main body or a user's specific motion. A three-dimensional net-like structure 101 includes a first three-dimensional sparse/dense structure 1 provided as an alternately layered configuration of structural units 1a1 to 1a9 that are sparse in an extrusion direction Y and structural units 1b1 to 1b8 that are dense in the extrusion direction Y. In this first three-dimensional sparse/dense structure 1, a bulk density δ1 of the sparse structural units 1a1 to 1a9 is 0.01 to 0.08 g/cm3 and a bulk density δ2 of the dense structural units 1b1 to 1b8 is 0.03 to 0.10 g/cm3. A ratio δ2/δ1 of the bulk density of the dense structural units 1b1 to 1b8 to the bulk density of the sparse structural units 1a1 to 1a9 is 1.01 to 5. A length A1 of the sparse structural units 1a1 to 1a9 is 1 to 50 cm, and a length A2 of the dense structural units 1b1 to 1b8 is 3 to 60 cm. A ratio A2/A1 of the length of the dense structural units 1b1 to 1b8 to the length of the sparse structural units 1a1 to 1a9 is 0.1 to 10.
