|Bob's Burgers character|
|Robert "Big Bob" Belcher, Sr.|
|Occupation||Owner of "Big Bob's Diner"|
|Relatives|| (see Belcher Family)|
Bob Belcher (son)
|Behind the scenes|
|First|| "Bob Fires The Kids (voice only)|
Father of the Bob (official)"
|Voiced by|| H. Jon Benjamin ("Bob Fires the Kids")|
Bill Hader ("Father of the Bob")
In earlier episodes he was referred to in past tense implying that he might have died but in Uncle Teddy, Bob refers to him in the present tense, revealing that he's still alive.
He is finally seen for the first time in Father of the Bob and is now voiced by Bill Hader. It is revealed that he and Bob's relationship was troubled after he refused to allow Bob to serve his creation, the "Baby You Can Chive My Car Burger" that he made and offered to Big Bob's Diner regular, Henry, while he was out getting his prostate examined. Also, Bob didn't want to continue working in the restaurant when he offered to change the name to reflect the both of them.
Bob and the family attend his Christmas party and after his prep guy's daughter goes into labor, he has no choice but to work with him. Things come to a head when Bob makes Henry the burger he didn't get a chance to eat 30 years before.
After Henry eats the burger and likes it, he goes to The Junk Yard next door, a bar owned by regular, Pete. He and Bob make up while line dancing after Bob finds that he kept the first review of Bob's Burgers.
Big Bob is father to Bob Belcher, father-in-law to Linda Belcher and grandfather to Tina, Gene and Louise Belcher. His wife and Bob's mother died sometime before the flashbacks shown in "Father of the Bob." His brother-in-law was Ernest Lombard. It is not clear if Bob's cousin Vanessa is his niece or was Bob's mother's niece.
- Bob Fires The Kids (voice only)
- He taught Bob how to drive ("Tina-Rannosaurus Wrecks").
- He is known as "Pop-Pop" by his grandchildren.
- Like Linda's father, Al, he was voiced by H. Jon Benjamin before the role was recast.
- Regularly attends screenings of Scandal and line dancing at Pete's bar, The Junk Yard.
- Bob mentions he had a drinking problem in Bob Fires the Kids. A fact backed up in a deleted audio outtake from Father of the Bob where Linda offers him Bailey's, however he is seen with a drink before he line dances at The Junk Yard.
- Disliked the fact that Bob named his grandson Gene.
- His wife's maiden name was Lombard.
- A picture of his restaurant can be seen in behind the couch in the Belchers' living room.