diff --git a/src/smf/metrics.c b/src/smf/metrics.c
index 8c37c9424..e14a359b2 100644
--- a/src/smf/metrics.c
+++ b/src/smf/metrics.c
@@ -202,6 +202,14 @@ const char *labels_slice[] = {
         .num_labels = OGS_ARRAY_SIZE(labels_slice), \
         .labels = labels_slice, \
     },
+#define SMF_METR_BY_SLICE_CTR_ENTRY(_id, _name, _desc) \
+    [_id] = { \
+        .type = OGS_METRICS_METRIC_TYPE_COUNTER, \
+        .name = _name, \
+        .description = _desc, \
+        .num_labels = OGS_ARRAY_SIZE(labels_slice), \
+        .labels = labels_slice, \
+    },
 ogs_metrics_spec_t *smf_metrics_spec_by_slice[_SMF_METR_BY_SLICE_MAX];
 ogs_hash_t *metrics_hash_by_slice = NULL;   /* hash table for SLICE labels */
 smf_metrics_spec_def_t smf_metrics_spec_def_by_slice[_SMF_METR_BY_SLICE_MAX] = {
@@ -210,6 +218,14 @@ SMF_METR_BY_SLICE_GAUGE_ENTRY(
     SMF_METR_GAUGE_SM_SESSIONNBR,
     "fivegs_smffunction_sm_sessionnbr",
     "Active Sessions")
+SMF_METR_BY_SLICE_CTR_ENTRY(
+    SMF_METR_CTR_SM_PDUSESSIONCREATIONREQ,
+    "fivegs_smffunction_sm_pdusessioncreationreq",
+    "Number of PDU sessions requested to be created by the SMF")
+SMF_METR_BY_SLICE_CTR_ENTRY(
+    SMF_METR_CTR_SM_PDUSESSIONCREATIONSUCC,
+    "fivegs_smffunction_sm_pdusessioncreationsucc",
+    "Number of PDU sessions successfully created by the SMF")
 };
 void smf_metrics_init_by_slice(void);
 int smf_metrics_free_inst_by_slice(ogs_metrics_inst_t **inst);
@@ -411,11 +427,15 @@ SMF_METR_BY_CAUSE_CTR_ENTRY(
     SMF_METR_CTR_SM_N4SESSIONESTABFAIL,
     "fivegs_smffunction_sm_n4sessionestabfail",
     "Number of failed N4 session establishments evidented by SMF")
+SMF_METR_BY_CAUSE_CTR_ENTRY(
+    SMF_METR_CTR_SM_PDUSESSIONCREATIONFAIL,
+    "fivegs_smffunction_sm_pdusessioncreationfail",
+    "Number of PDU sessions failed to be created by the SMF")
 };
 void smf_metrics_init_by_cause(void);
 int smf_metrics_free_inst_by_cause(ogs_metrics_inst_t **inst);
 typedef struct smf_metric_key_by_cause_s {
-    uint8_t                     cause;
+    int                         cause;
     smf_metric_type_by_cause_t  t;
 } smf_metric_key_by_cause_t;
 
@@ -425,7 +445,7 @@ void smf_metrics_init_by_cause(void)
     ogs_assert(metrics_hash_by_cause);
 }
 
-void smf_metrics_inst_by_cause_add(uint8_t cause,
+void smf_metrics_inst_by_cause_add(int cause,
         smf_metric_type_by_cause_t t, int val)
 {
     ogs_metrics_inst_t *metrics = NULL;
diff --git a/src/smf/metrics.h b/src/smf/metrics.h
index 80b7d2df5..8a2209e0c 100644
--- a/src/smf/metrics.h
+++ b/src/smf/metrics.h
@@ -68,6 +68,8 @@ static inline void smf_metrics_inst_gtp_node_dec(
 /* BY SLICE */
 typedef enum smf_metric_type_by_slice_s {
     SMF_METR_GAUGE_SM_SESSIONNBR = 0,
+    SMF_METR_CTR_SM_PDUSESSIONCREATIONREQ,
+    SMF_METR_CTR_SM_PDUSESSIONCREATIONSUCC,
     _SMF_METR_BY_SLICE_MAX,
 } smf_metric_type_by_slice_t;
 
@@ -88,11 +90,12 @@ void smf_metrics_inst_by_5qi_add(
 /* BY CAUSE */
 typedef enum smf_metric_type_by_cause_s {
     SMF_METR_CTR_SM_N4SESSIONESTABFAIL = 0,
+    SMF_METR_CTR_SM_PDUSESSIONCREATIONFAIL,
     _SMF_METR_BY_CAUSE_MAX,
 } smf_metric_type_by_cause_t;
 
 void smf_metrics_inst_by_cause_add(
-    uint8_t cause, smf_metric_type_by_cause_t t, int val);
+    int cause, smf_metric_type_by_cause_t t, int val);
 void smf_metrics_init(void);
 void smf_metrics_final(void);
 
diff --git a/src/smf/nsmf-handler.c b/src/smf/nsmf-handler.c
index 8bf29be21..6df4658c1 100644
--- a/src/smf/nsmf-handler.c
+++ b/src/smf/nsmf-handler.c
@@ -238,6 +238,8 @@ bool smf_nsmf_handle_create_sm_context(
 
     smf_metrics_inst_by_slice_add(&sess->plmn_id, &sess->s_nssai,
             SMF_METR_GAUGE_SM_SESSIONNBR, 1);
+    smf_metrics_inst_by_slice_add(&sess->plmn_id, &sess->s_nssai,
+            SMF_METR_CTR_SM_PDUSESSIONCREATIONREQ, 1);
 
     if (sess->sm_context_status_uri)
         ogs_free(sess->sm_context_status_uri);
diff --git a/src/smf/nudm-handler.c b/src/smf/nudm-handler.c
index 41cd7db21..2c5130708 100644
--- a/src/smf/nudm-handler.c
+++ b/src/smf/nudm-handler.c
@@ -332,6 +332,9 @@ bool smf_nudm_sdm_handle_get(smf_sess_t *sess, ogs_sbi_stream_t *stream,
     ogs_assert(response);
     ogs_assert(true == ogs_sbi_server_send_response(stream, response));
 
+    smf_metrics_inst_by_slice_add(&sess->plmn_id, &sess->s_nssai,
+            SMF_METR_CTR_SM_PDUSESSIONCREATIONSUCC, 1);
+
     ogs_free(sendmsg.http.location);
 
     r = smf_sbi_discover_and_send(
diff --git a/src/smf/sbi-path.c b/src/smf/sbi-path.c
index 9e4f3c3d1..9dc92af80 100644
--- a/src/smf/sbi-path.c
+++ b/src/smf/sbi-path.c
@@ -216,6 +216,9 @@ void smf_sbi_send_sm_context_create_error(
     ogs_assert(response);
     ogs_assert(true == ogs_sbi_server_send_response(stream, response));
 
+    smf_metrics_inst_by_cause_add(problem.status,
+            SMF_METR_CTR_SM_PDUSESSIONCREATIONFAIL, 1);
+
     if (n1smbuf)
         ogs_pkbuf_free(n1smbuf);
 }
diff --git a/src/smf/smf-sm.c b/src/smf/smf-sm.c
index 6e48b7d10..63dcd1486 100644
--- a/src/smf/smf-sm.c
+++ b/src/smf/smf-sm.c
@@ -530,6 +530,9 @@ void smf_state_operational(ogs_fsm_t *s, smf_event_t *e)
                     DEFAULT
                         sess = smf_sess_add_by_sbi_message(&sbi_message);
                         ogs_assert(sess);
+
+                        smf_metrics_inst_by_slice_add(NULL, NULL,
+                                SMF_METR_CTR_SM_PDUSESSIONCREATIONREQ, 1);
                     END
                     break;