SAM - Skip a Meal - Insulin Glargine, Diabetes Mellitus Type 1

Inclusion Criteria: Patients with type 1 Diabetes mellitus who have been treated with MDI (Multiple Daily Injection) basal/bolus insulin, regular insulin/short acting insulin analogue + NPH insulin on a stable dose (no change more than 10 %) for at least 4 weeks prior to study entry, who have an HBA1c smaller/equal 9 % (measured at visit 1) and a BMI smaller/equal 35 kg/m2. In addition, patients must have a FBG value at day 1 before skipping meal (6:00 am - 07:00 am) between 90 - 120 mg/dl (5.0 - 6.5 mmol/l). Exclusion Criteria: * Breast-feeding * History of hypersensitivity to the study medication or to drugs with similar chemical structures * Likelihood of requiring treatment during the study period with drugs not permitted by the study protocol * Treatment with any investigational drug in the last 30 days before study entry * Clinically relevant cardiovascular, hepatic, neurological, endocrine, or other major systemic disease making implementation of the protocol or interpretation of the study results difficult * History of drug or alcohol abuse No subjects who have previously been treated with Insulin glargine will be enrolled in this study.