To provide a razor unit containing a razor with shaving cream having a specific structure and a spare blade case used for it and the spare blade case used for the razor with shaving cream.

The holder 1 of a razor with shaving cream is provided with a cream guide plate section 13 exposed along the tip of a blade body assembly 3 supported on it. A spare blade case C is provided with multiple storage recesses 42, and blade body assemblies 3 are stored in the storage recesses 42 with fitting grooves 4 faced upward. A guide recess 44 through which the fitting rail 2 of the holder 1 passes when it is inserted into a fitting groove 4 is formed on a side wall 38, and a notch 46 through which the cream guide plate section 13 of the holder 1 passes at the time of this insertion is formed on the side wall 38. The fitting rail 2 of the special holder 1 can be surely inserted into the fitting groove 4 of the blade body assembly 3 by the guide recess section 44 and the notch 46 formed on the side wall 38 of the spare blade case C, and the blade body assemblies 3 can be surely stored in the spare blade case C, even in the special holder 1 having the cream guide plate section 13.