diff --git a/gen/gen_avx512.cpp b/gen/gen_avx512.cpp
index 0c11584..b417176 100644
--- a/gen/gen_avx512.cpp
+++ b/gen/gen_avx512.cpp
@@ -642,6 +642,11 @@ void putX_XM_IMM()
 
 		{ 0x56, "vreducepd", T_66 | T_0F3A | T_YMM | T_MUST_EVEX | T_EW1 | T_B64 | T_SAE_Z, true },
 		{ 0x56, "vreduceps", T_66 | T_0F3A | T_YMM | T_MUST_EVEX | T_EW0 | T_B32 | T_SAE_Z, true },
+
+		{ 0x54, "vpopcntb", T_66 | T_0F38 | T_YMM | T_MUST_EVEX | T_EW0 | T_SAE_Z, false },
+		{ 0x54, "vpopcntw", T_66 | T_0F38 | T_YMM | T_MUST_EVEX | T_EW1 | T_SAE_Z, false },
+		{ 0x55, "vpopcntd", T_66 | T_0F38 | T_YMM | T_MUST_EVEX | T_EW0 | T_SAE_Z, false },
+		{ 0x55, "vpopcntq", T_66 | T_0F38 | T_YMM | T_MUST_EVEX | T_EW1 | T_SAE_Z, false },
 	};
 	for (size_t i = 0; i < NUM_OF_ARRAY(tbl); i++) {
 		const Tbl *p = &tbl[i];
diff --git a/test/misc.cpp b/test/misc.cpp
index 62b23e2..d17cf08 100644
--- a/test/misc.cpp
+++ b/test/misc.cpp
@@ -356,4 +356,47 @@ CYBOZU_TEST_AUTO(shrd)
 	CYBOZU_TEST_EQUAL(c.getSize(), n);
 	CYBOZU_TEST_EQUAL_ARRAY(c.getCode(), tbl, n);
 }
+CYBOZU_TEST_AUTO(vpopcnt)
+{
+	struct Code : Xbyak::CodeGenerator {
+		Code()
+		{
+			vpopcntb(xmm5|k3|T_z, ptr [rax + 0x40]);
+			vpopcntb(ymm5|k3|T_z, ptr [rax + 0x40]);
+			vpopcntb(zmm5|k3|T_z, ptr [rax + 0x40]);
+
+			vpopcntw(xmm5|k3|T_z, ptr [rax + 0x40]);
+			vpopcntw(ymm5|k3|T_z, ptr [rax + 0x40]);
+			vpopcntw(zmm5|k3|T_z, ptr [rax + 0x40]);
+
+			vpopcntd(xmm5|k3|T_z, ptr [rax + 0x40]);
+			vpopcntd(ymm5|k3|T_z, ptr [rax + 0x40]);
+			vpopcntd(zmm5|k3|T_z, ptr [rax + 0x40]);
+
+			vpopcntq(xmm5|k3|T_z, ptr [rax + 0x40]);
+			vpopcntq(ymm5|k3|T_z, ptr [rax + 0x40]);
+			vpopcntq(zmm5|k3|T_z, ptr [rax + 0x40]);
+		}
+	} c;
+	const uint8_t tbl[] = {
+		0x62, 0xf2, 0x7d, 0x8b, 0x54, 0x68, 0x04,
+		0x62, 0xf2, 0x7d, 0xab, 0x54, 0x68, 0x02,
+		0x62, 0xf2, 0x7d, 0xcb, 0x54, 0x68, 0x01,
+
+		0x62, 0xf2, 0xfd, 0x8b, 0x54, 0x68, 0x04,
+		0x62, 0xf2, 0xfd, 0xab, 0x54, 0x68, 0x02,
+		0x62, 0xf2, 0xfd, 0xcb, 0x54, 0x68, 0x01,
+
+		0x62, 0xf2, 0x7d, 0x8b, 0x55, 0x68, 0x04,
+		0x62, 0xf2, 0x7d, 0xab, 0x55, 0x68, 0x02,
+		0x62, 0xf2, 0x7d, 0xcb, 0x55, 0x68, 0x01,
+
+		0x62, 0xf2, 0xfd, 0x8b, 0x55, 0x68, 0x04,
+		0x62, 0xf2, 0xfd, 0xab, 0x55, 0x68, 0x02,
+		0x62, 0xf2, 0xfd, 0xcb, 0x55, 0x68, 0x01,
+	};
+	const size_t n = sizeof(tbl) / sizeof(tbl[0]);
+	CYBOZU_TEST_EQUAL(c.getSize(), n);
+	CYBOZU_TEST_EQUAL_ARRAY(c.getCode(), tbl, n);
+}
 #endif
diff --git a/xbyak/xbyak_mnemonic.h b/xbyak/xbyak_mnemonic.h
index 06da38e..398fada 100644
--- a/xbyak/xbyak_mnemonic.h
+++ b/xbyak/xbyak_mnemonic.h
@@ -1843,6 +1843,10 @@ void vpmovw2m(const Opmask& k, const Xmm& x) { opVex(k, 0, x, T_F3 | T_0F38 | T_
 void vpmovwb(const Operand& op, const Xmm& x) { opVmov(op, x, T_N8 | T_N_VL | T_F3 | T_0F38 | T_EW0 | T_YMM | T_MUST_EVEX, 0x30, true); }
 void vpmullq(const Xmm& x1, const Xmm& x2, const Operand& op) { opAVX_X_X_XM(x1, x2, op, T_66 | T_0F38 | T_EW1 | T_YMM | T_MUST_EVEX | T_B64, 0x40); }
 void vpmultishiftqb(const Xmm& x1, const Xmm& x2, const Operand& op) { opAVX_X_X_XM(x1, x2, op, T_66 | T_0F38 | T_EW1 | T_YMM | T_MUST_EVEX | T_B64, 0x83); }
+void vpopcntb(const Xmm& x, const Operand& op) { opAVX_X_XM_IMM(x, op, T_66 | T_0F38 | T_EW0 | T_YMM | T_SAE_Z | T_MUST_EVEX, 0x54); }
+void vpopcntd(const Xmm& x, const Operand& op) { opAVX_X_XM_IMM(x, op, T_66 | T_0F38 | T_EW0 | T_YMM | T_SAE_Z | T_MUST_EVEX, 0x55); }
+void vpopcntq(const Xmm& x, const Operand& op) { opAVX_X_XM_IMM(x, op, T_66 | T_0F38 | T_EW1 | T_YMM | T_SAE_Z | T_MUST_EVEX, 0x55); }
+void vpopcntw(const Xmm& x, const Operand& op) { opAVX_X_XM_IMM(x, op, T_66 | T_0F38 | T_EW1 | T_YMM | T_SAE_Z | T_MUST_EVEX, 0x54); }
 void vpord(const Xmm& x1, const Xmm& x2, const Operand& op) { opAVX_X_X_XM(x1, x2, op, T_66 | T_0F | T_EW0 | T_YMM | T_MUST_EVEX | T_B32, 0xEB); }
 void vporq(const Xmm& x1, const Xmm& x2, const Operand& op) { opAVX_X_X_XM(x1, x2, op, T_66 | T_0F | T_EW1 | T_YMM | T_MUST_EVEX | T_B64, 0xEB); }
 void vprold(const Xmm& x, const Operand& op, uint8 imm) { opAVX_X_X_XM(Xmm(x.getKind(), 1), x, op, T_66 | T_0F | T_EW0 | T_YMM | T_MUST_EVEX | T_B32, 0x72, imm); }