diff --git a/source/engine/mecanismViews/Allègement.js b/source/engine/mecanismViews/Allègement.js
new file mode 100644
index 000000000..6ba8e9597
--- /dev/null
+++ b/source/engine/mecanismViews/Allègement.js
@@ -0,0 +1,60 @@
+import React from 'react'
+import { Node } from './common'
+import { makeJsx } from '../evaluation'
+import { mapObjIndexed, values } from 'ramda'
+
+export default (nodeValue, explanation) => (
+	<div>
+		<Node
+			classes="mecanism allègement"
+			name="allègement"
+			value={nodeValue}
+			child={
+				<ul className="properties">
+					<li key="assiette">
+						<span className="key">assiette: </span>
+						<span className="value">{makeJsx(explanation.assiette)}</span>
+					</li>
+					{explanation.franchise && (
+						<li key="franchise">
+							<span className="key">franchise: </span>
+							<span className="value">{makeJsx(explanation.franchise)}</span>
+						</li>
+					)}
+					{explanation.décote && (
+						<li key="décote">
+							<span className="key">décote: </span>
+							<span className="value">
+								<ObjectView data={explanation.décote} />
+							</span>
+						</li>
+					)}
+					{explanation.abattement && (
+						<li key="abattement">
+							<span className="key">abattement: </span>
+							<span className="value">{makeJsx(explanation.abattement)}</span>
+						</li>
+					)}
+				</ul>
+			}
+		/>
+	</div>
+)
+
+let ObjectView = ({ data }) =>
+	console.log('data', data) || (
+		<ul className="properties">
+			{values(
+				mapObjIndexed(
+					(v, k) => (
+						<li key={k}>
+							{' '}
+							<span className="key">{k}: </span>
+							<span className="value">{makeJsx(v)}</span>
+						</li>
+					),
+					data
+				)
+			)}
+		</ul>
+	)
diff --git a/source/engine/mecanisms.js b/source/engine/mecanisms.js
index 0e77c4ca1..fd0159cbf 100644
--- a/source/engine/mecanisms.js
+++ b/source/engine/mecanisms.js
@@ -50,6 +50,7 @@ import {
 
 import 'react-virtualized/styles.css'
 import Somme from './mecanismViews/Somme'
+import Allègement from './mecanismViews/Allègement'
 import buildSelectionView from './mecanismViews/Selection'
 import uniroot from './uniroot'
 
@@ -575,7 +576,7 @@ export let mecanismReduction = (recurse, k, v) => {
 
 	return {
 		evaluate,
-		jsx: (nodeValue, explanation) => <div>Allègement</div>,
+		jsx: Allègement,
 		explanation,
 		category: 'mecanism',
 		name: 'allègement',