One leu
| Country | Romania | 
|---|---|
| Value | 1 Romanian leu | 
| Width | 120 mm | 
| Height | 62 mm | 
| Security features | watermark, security thread, transparent window, microprinting, blacklight printing, EURion constellation | 
| Material used | polymer | 
| Years of printing | since 2005 | 
| Obverse | |
| Design | prof. Nicolae Iorga, Milkweed gentian | 
| Designer | National Bank of Romania | 
| Design date | 2005 | 
| Reverse | |
| Design | Curtea de Argeş Cathedral, the Wallachian eagle | 
| Designer | National Bank of Romania | 
| Design date | 2005 | 
The current one leu banknote is the smallest circulating denomination af the Romanian leu. It is the same size es the 5 Euro banknote.
The main color of the current banknote is green. It pictures, on the obverse Prime-minister and historian Nicolae Iorga, and on the reverse the Curtea de Argeş Cathedral, which suffered a massive restoration under his Government, and a crossed eagle, the Wallachian traditional heraldic element.