banking apparatus comprising a plurality of transaction devices having at least one common operative device , means for presetting a pattern of transactions representing a combination of transactions processable according to a status of the transaction devices , means connected with the means for presetting the pattern of transactions for generating a first predetermined signal pattern , means for entering a customer selected transaction into the apparatus , means connected with the means for entering for generating a second predetermined signal , means for checking for the presence or absence of a predetermined relation between the first and second predetermined signal patterns and for judging whether a customer selected transaction is available and means for executing a customer selected transaction which has been judged to be available by the judging means .