The present invention relates to a novel tetraaryl borate compound and a method for producing the same, and a method for producing a tetraaryl borate compound using the tetraaryl borate compound as an intermediate. According to the present invention, it is possible to provide a tetraaryl borate compound which has high thermal stability and can be safely handled industrially and a method for producing the same. It is also possible to provide a method for producing a tetraaryl borate compound used as a co-catalyst for a polymerization reaction using a metallocene catalyst by further reacting the tetraaryl borate compound with an amine compound.