Inclusion Criteria:

Patients who meet the following criteria at baseline will be evaluated in the
investigation;

- Patients with Crohn's disease indicated for Humira treatment with the recommended
dosage regimen

- Patients with no past- or present malignant tumors

- Patients who are not currently receiving Humira

Exclusion Criteria:

- Contraindications according to the Package Insert

- Patients who have serious infections

- Patients who have tuberculosis

- Patients with a history of hypersensitivity to any ingredient of Humira

- Patients who have demyelinating disease or with a history of demyelinating disease

- Patients who have congestive cardiac failure