As with most stories, The Adventures of Tom Sawyer has multiple conflicts. Man versus man is definitely one of the conflict types that exists in this great book; however, Tom is in conflict with various people in the book. I would say that the conflict with a standard "bad guy" archetype occurs between Tom and Injun Joe. Tom is in man versus man conflict with Becky and Aunt Polly at various times in the novel as well. His conflicts with Aunt Polly are some of my favorites because of how she is always punishing him for his various acts of mischief.
A man versus nature conflict occurs when Tom is trapped in the caves and when the storm hits Jackson Island. Finally, man versus self is an important conflict type that exists in this book as well. Tom is constantly in a struggle to do what he wants to do instead of what he knows is the right thing to do. We see this conflict in a major way when Tom struggles with whether or not to report the truth about Dr. Robinson's murder.