Architecture of Malay in Riau has its style to the structural elements of a building. One of the Riau architecture styles is typology and ornaments. The study in this article aims to discover the application of Malay architecture Riau in terms of the typology and ornaments that existed in Rumah Lontiok. The method used in this article is a qualitative research method with a case study by surveying directly to obtain the data. The data were obtained through observation, interview, documentation, and literature review. The data were primary and secondary. The results were based on the typology of Malay architecture Riau and ornaments existing in Rumah Lontiok, which could be seen in the application of existing styles in the typology of roofs, pillars, stairs, Rangkiang, walls, and windows. One of Rumah Lontiok's characteristics is the roof, which is tilted up like a long Sampan. The existence of typology and ornaments in this Rumah Lontiok reflects the image of a traditional house and Malay Architecture in Riau. It is also influenced by Islamic culture, which reflects that in Malay culture people are Muslim majority.