In the present work, dissolved cellulose has been 3D bioprinted to produce complex structures with ordered interconnected pores. The process consists of the dissolution of dissolving pulps in N-methylmorpholine-N-oxide (NMMO), multilayered dispensing, water removal of NMMO and freeze-drying. 3D bioprinting of cellulose/NMMO solution at 70 ℃ was analogous to that of thermoplastics by the process of melting and solidification to produce cellulose/NMMO objects in the solid form. However, 3D bioprinting of cellulose/NMMO solution at a higher temperature than 70 ℃ produced cellulose/NMMO objects in the gel form. Cellulose was regenerated by water; thereafter, freeze-drying treatment maintained the 3D bioprinted structures…