How can i convince my boss to stop smoking?

Quitting from a bad habit is 99% will-power. I think your boss is well-aware of the dangers brought about by smoking not only to himself but most importantly to others, he must have that iron will of commitment if he really want to quit from it.

Oh, it's very hard to convince others to do or stop doing something, especially when smoking is well-known for it's bad effects, and he/she's your boss! If he/she is one that love listening to others' opinions, you may convince him by explaining the bad effects resulted by smoking too much, with the aid of some pictures illustrating smokers with bad teeth, yellowish fingernails, ugly face. If you can find X-Rays of lungs of smoker and non-smokers, this would be even more convincing! (This is true. I did know someone stop smoking after reading the comparison of normal and bad lungs).

It is very difficult to change the habit of your boss.He only can decide to quit this bad habit.

OH, my dear , my boss is an Italian , and he do not smoke in the office never , and he ask others not smoking in the office also ! You are not lucky , you can give him a card written "NO SMOKING" !!!!