If you wanna lay your head on Justin Bieber's pillow ... or even frolic in his bed ... all you have to do is pony up $279K -- and you can own Justin's boyhood bedroom.
Justin's grandparents are selling their 3-bedroom home in Stratford, Ontario ... and one of those bedrooms belonged to young Biebs -- who spent about 80% of his childhood at the house.
The house is being marketed as Justin's former crib. As for the asking price ... it's pushing it, but grandma and gramps think a rich Belieber will ante up.
Real estate sources say the home has been updated ... but Justin's room has been left intact -- it's decorated the way he liked it ... with the logo of his favorite hockey team, the Toronto Maple Leafs, emblazoned on the bedding, curtains and wallpaper.