diff --git a/frappe/public/js/frappe/views/reports/report_view.js b/frappe/public/js/frappe/views/reports/report_view.js
index 95a3577698..c7d001ed94 100644
--- a/frappe/public/js/frappe/views/reports/report_view.js
+++ b/frappe/public/js/frappe/views/reports/report_view.js
@@ -836,8 +836,15 @@ frappe.views.ReportView = class ReportView extends frappe.views.ListView {
 			const child_table_fields = frappe.meta.get_docfields(cdt).filter(standard_fields_filter);
 
 			out[cdt] = child_table_fields;
-		});
 
+			// add index column for child tables
+			out[cdt].push({
+				label: __('Index'),
+				fieldname: 'idx',
+				fieldtype: 'Int',
+				parent: cdt
+			});
+		});
 		return out;
 	}
 
@@ -857,7 +864,7 @@ frappe.views.ReportView = class ReportView extends frappe.views.ListView {
 				.map(df => ({
 					label: __(df.label),
 					value: df.fieldname,
-					checked: this.fields.find(f => f[0] === df.fieldname)
+					checked: this.fields.find(f => f[0] === df.fieldname && f[1] === this.doctype)
 				}))
 		});
 
@@ -936,6 +943,15 @@ frappe.views.ReportView = class ReportView extends frappe.views.ListView {
 			docfield = this.group_by_control.get_group_by_docfield();
 		}
 
+		// child table index column
+		if (fieldname === 'idx' && doctype !== this.doctype) {
+			docfield = {
+				label: "Index",
+				fieldtype: "Int",
+				parent: doctype,
+			};
+		}
+
 		if (!docfield) {
 			docfield = frappe.model.get_std_field(fieldname, true);