Petty cash book is a part of cash book. The book (cash book) kept by the petty cashier for keeping a record for payment of petty or small expenses is known as Petty cash book.
Petty cashier prepares the petty cash book, in which separate columns are maintained for various petty or small expenses to be paid by the petty cashier. So that the information of various types of expenses (and total amount) paid by the petty cashier is available.
Petty cash book can be prepared in two types :(1) Simple petty cash book and (2) Petty cash book on Imprest system.