Allan Russell's strike was enough to secure three points for Airdrie against Queen's Park at Hampden.
The Diamonds took the lead after seven minutes when Stuart Noble showed sublime skill before sending in a cross for Russell to fire home.
Queen's Park pressed for an equaliser with Steve Canning and Mark Ferry going close for The Spiders.
However, Kenny Black's side held on despite a late scare when Stuart Kettlewell went close in injury-time.
Queen's Park: Cairns, Paton, Dunlop, Molloy (Quinn 83), Agostini, Trouten, Kettlewell, Cairney, Ferry, Canning, McGrady (Ronald 46). Subs Not Used: Ure, Boslen, Murray.
Booked: McGrady, Kettlewell.
Airdrie Utd: Robertson, McKenna, Smyth, Sharp, Lovering, McDonald, Smith (Holmes 65), McKeown, Waddle, Russell, Noble (Prunty 78). Subs Not Used: Donnelly, Gillies, Hollis.
Goals: Russell 38.
Ref: B Winter