Because collagen is not temperature-sensitive and has low viscosity, it is difficult to gel rapidly on the printing substrate and fabricate a scaffold with a clear and stable structure by extrusion bioprinting. In previous studies, collagen was most often used in inkjet bioprinting but rarely as bioink in extrusion bioprinting. For our research, collagen was successfully printed using extrusion bioprinting technology by adding it to a gelatin/alginate system, which is widely used in extrusion bioprinting. We found that, by adding 0.82 mg/ml of collagen to gelatin/alginate, the solution could achieve complete homogeneity and be suitable for extrusion bioprinting, which can fabricate a stable 3D hydrogel macroporous network. Otherwise, the solution appeared stratified and could not be used for extrusion bioprinting. The incorporation of collagen as a bioink for bioprinting not only better mimics tissue-specific ECM but also results in a more fibrous structure. Rutz et al. noted that the fibrous structure allowed cells to recognise the construct more readily and enhanced the robustness of the construct