Every arabic country has his own dialect, so 19 dialects :)

as Rim kehia said "Every arabic country has his own dialect, so 19 dialects :)" from this , which countries also have sub dialects ( accent) so, it also devided up more, it could be up to 100 or even dialects in total.

4 ( sham,Gulf,Morocco,Egyptian)

there are a lot of dialects but you can combine it in 4 or 5 major dialects.

Some Arab countries have two or three dialects coexisted.