Disclosed herein is new Viola cornuta plant named 'Sunvioho', which is a vegetative propagated variety that was developed by specific hybridization between '9V-39a' and 'Alpine Sun'. 'Sunvioho' has a spreading habit with very long stem. The plant height is low and the branching is abundant. Flowers are vertically oblong and very small. The color of flower is pale yellow green with vivid yellow eye. The plant has a high resistance to rain, cold, pests and diseases.