When an inner cover portion 42 is accommodated in a blister pack 41, a retention space area 40a for accommodating a capsule endoscope 2 is formed between the bottom face 42e of the inner cover portion 42 and the inside bottom face 41e2 of the blister pack 41. The capsule endoscope 2, retained by a retaining portion 41e3 formed in the blister pack 41 and by a hole portion 42e1 formed in the inner cover portion 42, is set into a storage case 40. The entire capsule endoscope accommodated in the storage case is uniformly and satisfactorily sterilized by blocking the opening of the blister pack 41 with a sterilizing sheet 43.
