In conclusion, with this work, we have successfully developed a new microalgae-based photocurable resin for SLA printers. The microalgal oil was epoxidated and methacrylated to obtain the MEMO, with a DoM between 1.2 and 2.2 based on the reaction protocol performed. By mixing the MEMO with IBOMA as diluent and BAPO as photoinitiator, we created a library of biobased methacrylate photoresins. Performing then mechanical tests on samples obtained with different compositions, we selected the resin formulation used to print 3D designs. The fabricated prototypes showed not only interesting mechanical properties, with an elongation at break significantly higher than a commercial resin but also the compatibility with the mSLA technology, with printed details of 200 µm. This bio-based provides a more sustainable alternative to the more common soybean oil-based resins, to increase the use of green materials in additive manufacturing.