Slattery explained to The Atlantic that he never worries about his real-life young son becoming confused while watching Roger's womanising antics.
"[My son] gets the character. He understands Mad Men isn't a documentary," the actor quipped. "Roger isn't who I am. This is my job."
Slattery also rejected the suggestion that Roger is unscrupulous both in his business ethics and commitment to his marriage.
"Roger doesn't go around stabbing people in the back," the star insisted. "He doesn't go against his word. Once Roger says something, that's pretty much what he does."
The actor recently revealed that one of the key storylines of Mad Men's fifth season is Roger's growing unhappiness.
Mad Men airs on Sundays on AMC in the US and Tuesdays on Sky Atlantic in the UK.
> Mad Men Jon Hamm: 'More of Don's past will be revealed'
Watch a trailer for the fifth season of Mad Men below: