Clinical Trial to Compare the Solifenacin/Tamsulosin Combination Therapy With Tamsulosin Monotherapy for LUTS Due to BPH

Inclusion Criteria: * Over 45 years * Benign Prostate Hyperplasia diagnosed by 20 mL \< TRUS * Lower urinary tract symptom suggestive of benign prostate hyperplasia, who spontaneously agree to join and sign to the consent form Exclusion Criteria: * Subjects who have a history of the lower urinary tract cancer, including prostate cancer and bladder cancer within the past 3 years * Subjects who have acute urinary retention within 12 weeks before screening * Subjects who have clinically significant severe cardiovascular disease(unstable angina, myocardial infarction or arrhythmia) within 24 weeks before screening * Subjects who have hypersensitivity to investigational product * Subjects who were suspected or confirmed neurogenic bladder, bladder neck structure, bladder diverticulum * Subjects who have myasthenia gravis, narrow angle glaucoma * Subjects who have hereditary problems of galactose intolerance, Lapp lactase deficiency or glucose-galactose malabsorption * SBP \> 180 mmHg or DBP \> 100 mmHg * HbA1c \> 9.0 % * Subjects who are judged by the investigators to be unsuitable to participate in the clinical trial.