diff --git a/src/frontend/A32/decoder/thumb32.inc b/src/frontend/A32/decoder/thumb32.inc
index 8095927c..8aabfc88 100644
--- a/src/frontend/A32/decoder/thumb32.inc
+++ b/src/frontend/A32/decoder/thumb32.inc
@@ -5,7 +5,7 @@ INST(thumb32_STMIA,          "STMIA/STMEA",              "1110100010W0nnnn0iiiii
 //INST(thumb32_POP,            "POP",                      "1110100010111101----------------")
 //INST(thumb32_LDMIA,          "LDMIA/LDMFD",              "1110100010-1--------------------")
 //INST(thumb32_PUSH,           "PUSH",                     "1110100100101101----------------")
-//INST(thumb32_STMDB,          "STMDB/STMFD",              "1110100100-0--------------------")
+INST(thumb32_STMDB,          "STMDB/STMFD",              "1110100100W0nnnn0iiiiiiiiiiiiiii")
 //INST(thumb32_LDMDB,          "LDMDB/LDMEA",              "1110100100-1--------------------")
 //INST(thumb32_SRS_1,          "SRS",                      "1110100110-0--------------------")
 //INST(thumb32_RFE_2,          "RFE",                      "1110100110-1--------------------")
diff --git a/src/frontend/A32/translate/impl/thumb32_load_store_multiple.cpp b/src/frontend/A32/translate/impl/thumb32_load_store_multiple.cpp
index a821d0aa..f6fb751d 100644
--- a/src/frontend/A32/translate/impl/thumb32_load_store_multiple.cpp
+++ b/src/frontend/A32/translate/impl/thumb32_load_store_multiple.cpp
@@ -26,9 +26,8 @@ bool ThumbTranslatorVisitor::thumb32_STMIA(bool W, Reg n, Imm<15> reg_list) {
     for (size_t i = 0; i < 15; i++) {
         if (Common::Bit(i, regs_imm)) {
             ir.WriteMemory32(address, ir.GetRegister(static_cast<Reg>(i)));
+            address = ir.Add(address, ir.Imm32(4));
         }
-
-        address = ir.Add(address, ir.Imm32(4));
     }
 
     if (W) {
@@ -37,4 +36,34 @@ bool ThumbTranslatorVisitor::thumb32_STMIA(bool W, Reg n, Imm<15> reg_list) {
     return true;
 }
 
+bool ThumbTranslatorVisitor::thumb32_STMDB(bool W, Reg n, Imm<15> reg_list) {
+    const auto regs_imm = reg_list.ZeroExtend();
+    const auto num_regs = static_cast<u32>(Common::BitCount(regs_imm));
+
+    if (n == Reg::PC || num_regs < 2) {
+        return UnpredictableInstruction();
+    }
+    if (W && Common::Bit(static_cast<size_t>(n), regs_imm)) {
+        return UnpredictableInstruction();
+    }
+    if (reg_list.Bit<13>()) {
+        return UnpredictableInstruction();
+    }
+
+    const IR::U32 start_address = ir.Sub(ir.GetRegister(n), ir.Imm32(4 * num_regs));
+    IR::U32 address = start_address;
+
+    for (size_t i = 0; i < 15; i++) {
+        if (Common::Bit(i, regs_imm)) {
+            ir.WriteMemory32(address, ir.GetRegister(static_cast<Reg>(i)));
+            address = ir.Add(address, ir.Imm32(4));
+        }
+    }
+
+    if (W) {
+        ir.SetRegister(n, start_address);
+    }
+    return true;
+}
+
 } // namespace Dynarmic::A32
diff --git a/src/frontend/A32/translate/impl/translate_thumb.h b/src/frontend/A32/translate/impl/translate_thumb.h
index 044bd9dd..33fa6147 100644
--- a/src/frontend/A32/translate/impl/translate_thumb.h
+++ b/src/frontend/A32/translate/impl/translate_thumb.h
@@ -173,6 +173,7 @@ struct ThumbTranslatorVisitor final {
 
     // thumb32 load/store multiple instructions
     bool thumb32_STMIA(bool W, Reg n, Imm<15> reg_list);
+    bool thumb32_STMDB(bool W, Reg n, Imm<15> reg_list);
 
     // thumb32 data processing (shifted register) instructions
     bool thumb32_TST_reg(Reg n, Imm<3> imm3, Imm<2> imm2, ShiftType type, Reg m);