A solid preparation for dialysis for preparing a double preparation type sodium bicarbonate solid preparation for dialysis in which there is no fear that a sugar component is decomposed or colored, and which can maintain stability and is also excellent in content homogeneity and a process for producing the same. The solid preparation for dialysis is a mixture of a first composition composed of core particles including sodium chloride and a coating layer containing one or more electrolytes, a second composition composed of core particles including a sugar that is covered with a coating layer comprising the same sugar or a different sugar, and an acid.