The goal of the research was to determine the influence of different additions on the textural features of gluten free breads. Basic ingredients used for preparations of gluten free breads were rice flour and potato starch. Additionally, 1% of xanthan gum was added. The influence of the following additions on gluten free breads features was investigated: soy protein isolate in amount from 3 to 7% and tranglutaminase in amount of 1, 5, and 10 U. The values of specific mass, crumb porosity, specific volume, and moisture (after 24 and 48 h) were determined. Also profile texture analysis (TPA) was performed through the determination of hardness, springiness, elasticity and chewiness. Based on obtained results, it was noted that the addition of soy protein isolate had a positive impact on gluten free bread texture, especially at the dose of 5%. The addition of transglutaminase improved the textural features of gluten free breads with soy protein isolate. An additional improvement was observed after partial substitution (50%) of water by milk in gluten free breads with a content of transglutaminase and soy protein isolate.