Abstract: The invention provides a scroll type fluid machine in which a performance is improved by improving assembling accuracy and reliability is improved by giving strength to wraps. The scroll type fluid machine is provided with an orbiting scroll having an end plate and a wrap stood on the end plate, and a fixed scroll having an end plate and a wrap stood on the end plate and structured such that a motion within a surface perpendicular to an axial direction is restricted, thereby reducing or expanding a volume formed by engaging the wraps of the fixed scroll and the orbiting scroll with each other so as to close between both of the scrolls. In the scroll type fluid machine, a side surface clearance formed between both of the wraps is formed to be smaller in a range between a central winding start point of the wrap and a section close to a center of the wrap than in a range between the section close to the center of the wrap and a section close to an outer periphery of the wrap.