A flush handle for a vehicle door having a slider, a handle unit and a linear motion conversion mechanism. The linear motion conversion mechanism includes a linear motion conversion unit and a driving unit. The linear motion conversion unit includes at least first and second inclined long holes, and at least one pin, configured to couple to the handle unit, and slide along the inclined long holes. The pin includes a first pin configured to slide in the first inclined long hole and a second pin configured to slide in the second inclined long hole. The handle unit includes an extension portion, configured to couple to the first pin, and adjust a distance between the first pin and an outer surface of the handle unit.