Laser toothbrush was developed for antibacterial effect from various poisonous bacilluses increasing inside mouth with pain mitigation effects of various disease in mouth, as antibacterial effect that controls propagation of poisonous bacillus, can get effect of disease prevention in the advance from disease including teeth (periodontal) in mouth, especially, it is vanguard life Medical instrument designed and developed for bactericidal effect  from various poisonous bacilluses increasing to Toothbrush keeping after clean teeth or mouth.