The act of default of a debtor in a financing contract at a shari'a financial institution will have a negative impact on creditors, namely losses, so to recover the loss, the debtor is obliged to be responsible for his actions.this study aims to find the concept of the debtor's responsibility for defaulting on the appropriate financing contract for dispute resolution at the shari'a financial institution. The research method used is empirical juridical, with a qualitative descriptive approach, BMT UGT Sidogiri cab Mojo Kediri as data sources and fatwa's ulama on compensation. The results of this study are presented; A. about default; Default is perceived as the act of not carrying out installment payments for three installments either consecutively or intermittently, not carrying out repayment when due. B. on the responsibility, that the debtor who defaulted on BMT UGT Sidogiri is obliged to; Paying off the total remaining installments that have not been paid, responsible for the amount of the remaining installments both principal and for the profit, releasing collateral objects either sold alone or through the power to sell by the BMT UGT Sidogiri cab. Mojo Kediri.