The present invention relates to glucoamylase variants, and especially relates to variants of a starch binding domain (SBD) of glucoamylase. The present invention also relates to the variant having altered properties (e.g., improved thermostability and/or specific activity) compared to a corresponding parent glucoamylase. The present invention also relates to enzyme compositions comprising a variant glucoamylase, DNA constructs comprising polynucleotides encoding the variants and methods of producing the variant glucoamylases in host cells.