Mushroom Mycelium Mask is a bio-mask designed for introducing mycelium to the public in a more pleasant way. Mycelium consumes natural waste to grow into the desired shape, and has a white surface as a drawing paper. From those features, we decided to design masks and hold workshops as everyone used to decorate and play with when we were young. The workshop is highly sustainable and universal as it gives direct experience and can be implemented in many places regardless of age. Through this, we aim to have a large number of people experience and be interested in eco-friendly materials.