A natural join is a type of inner join where the join condition is based on all the columns with the same name in both tables, while an inner join is a join that returns only the matching rows between two tables based on a specific join condition.

In a natural join, you don't specify the join condition explicitly, but in an inner join, you need to explicitly define the join condition using a predicate in the WHERE clause or the JOIN clause.

Another difference is that a natural join may result in more records being returned if there are multiple columns with the same name in both tables, whereas an inner join will only return the matching records as per the specified join condition.