Lasse Pöysti is a Finnish actor, director and a screenwriter. He has acted in both Finnish and Swedish productions. He retired from acting in 2012.
| Movie | La Vénitienne | Nathan Burnstein | 2010-09-28 |
| Movie | Thomas | Thomas | 2009-11-20 |
| Series | Maan mitta | Niiranen | 2007-10-31 |
| Movie | Lapin kullan kimallus | Konrad Planting | 1999-09-10 |
| Movie | White Lies | Lindqvist | 1995-01-27 |
| Movie | The Tears of Saint Peter | The Cripple | 1995-08-11 |
| Movie | Pieniä valheita | Aaro | 1994-05-07 |
| Movie | Macklean | Carl August Ehrensvärd | 1993-04-08 |
| Movie | Rosenbaum - Bländverk | Erik "Lunkan" Lundkvist | 1993-09-13 |
| Movie | Rosenbaum - Målbrott | Erik "Lunkan" Lundkvist | 1993-10-29 |
| Movie | Rosenbaum - Det sista vittnet | Erik "Lunkan" Lundkvist | 1993-11-05 |
| Movie | Mestari | Kalevi Suomalainen | 1992-03-06 |
| Movie | Kukunor | Vuoriukko | 1989-04-07 |
| Movie | Ihmiselon ihanuus ja kurjuus | Martti Hongisto | 1988-12-16 |
| Series | Nutcases & Normals | Morfar | 1988-12-25 |
| Movie | Kuningas lähtee Ranskaan | The Stablemaster | 1986-09-19 |
| Movie | The Blessed Ones | Dr. Dettow | 1986-02-19 |
| Movie | Näkemiin, hyvästi | 1986-12-19 | |
| Movie | Maailman paras | Vanha paavo Nurmi | 1986-12-29 |
| Movie | A Matter of Life and Death | 1986-11-20 | |
| Movie | The Clan: Tale of the Frogs | Siilipää | 1984-11-30 |
| Movie | Dirty Story | The detective | 1984-12-21 |
| Movie | The School of Wives | Chrysalde | 1983-12-25 |
| Movie | The Flight of the Eagle | Photographer | 1982-08-26 |
| Movie | Barna från Blåsjöfjället | Lasso-Lassi | 1980-11-15 |
| Movie | Herr Puntila And His Servant Matti | Johannes Puntila | 1979-12-21 |
| Movie | The Adventures of Picasso | Sirkka's Father (uncredited) | 1978-05-20 |
| Movie | Pyhä perhe | Paavo Mäkinen | 1976-10-29 |
| Series | Mumintrollet | Mumintrollet | 1969-12-05 |
| Movie | Punahilkka | Matti, lentokapteeni | 1968-11-01 |
| Series | Meidän Herramme muurahaisia | konstaapeli Metso | 1964-11-09 |
| Movie | Swedish Wedding Night | nasaren | 1964-08-23 |
| Movie | The City | 1962-03-20 | |
| Movie | Justus järjestää kaiken | Justus | 1960-04-15 |
| Movie | Iskelmäkaruselli pyörii | 1960-07-14 | |
| Movie | Taas tapaamme Suomisen perheen | Olli Suominen | 1959-12-25 |
| Movie | Asessorin naishuolet | Veikko Pajukivi | 1958-02-07 |
| Movie | Sotapojan heilat | Esko Puustinen | 1958-08-15 |
| Movie | Vääpelin kauhu | Jaska | 1957-07-19 |
| Movie | Syntipukki | Frans Koikkalainen | 1957-08-30 |
| Movie | Sankarialokas | Esko Sirola | 1955-07-28 |
| Movie | Näkemiin Helena | Lennu Jaatikainen | 1955-02-18 |
| Movie | Villi Pohjola | Jean | 1955-09-30 |
| Movie | Kovanaama | Esko Pekuri | 1954-01-29 |
| Movie | Laivaston monnit maissa | Segerstråhle | 1954-07-16 |
| Movie | Putkinotko | Malakias | 1954-09-10 |
| Movie | 2 hauskaa vekkulia | Jussi Mäki | 1953-04-30 |
| Movie | Miljonäärimonni | Lasse Vihuri | 1953-07-03 |
| Movie | Kaikkien naisten monni | Nieminen | 1952-07-04 |
| Movie | Kenraalin morsian | Jukka Oksapää | 1951-06-29 |
| Movie | Vain laulajapoikia | Dr. Aarne Syrjä | 1951-02-23 |
| Movie | Radio tekee murron | Radio Reporter | 1951-04-06 |
| Movie | Rion yö | Lasse | 1951-08-03 |
| Movie | Vihaan sinua – rakas | Tauno Karnala | 1951-11-30 |
| Movie | Tukkijoella | Pölhö-Kustaa | 1951-09-21 |
| Movie | Rakkaus on nopeampi Piiroisen pässiäkin | Heikki Piiparinen | 1950-12-22 |
| Movie | Ruma Elsa | Usko Aamunen | 1949-02-04 |
| Movie | Katupeilin takana | Arvid Molander | 1949-11-04 |
| Movie | Professori Masa | Pentti Simola | 1949-12-23 |
| Movie | Sinut minä tahdon | Seppo Vesa | 1949-11-17 |
| Movie | Kilroy sen teki | Pete | 1948-03-12 |
| Movie | Hormoonit valloillaan | Pena | 1948-08-20 |
| Movie | Suomisen Olli yllättää | Olli Suominen | 1945-08-26 |
| Movie | Suomisen Olli rakastuu | Olli Suominen | 1944-12-25 |
| Movie | Suomisen taiteilijat | Olli Suominen | 1943-12-25 |
| Movie | Suomisen Ollin tempaus | Olli Suominen | 1942-11-29 |
| Movie | Suomisen perhe | Olli Suominen | 1941-03-02 |
| Movie | Täysosuma | (uncredited) | 1941-11-09 |
| Movie | Onnellinen ministeri | (uncredited) | 1941-12-21 |