fitzroy (3rd) v north (4th)
roos knock lions out by 4 they will play collingwood in the prelim final.
First Semi-final
| Q1 | Q2 | Q3 | Q4 | Score | Date / Result | Ground | Crowd | ||
| Fitzroy | 3.3 | 4.7 | 5.8 | 9.12 | 66 | Sat 30-Aug-1958 2:30 pm | M.C.G. | 68,213 | |
| North Melbourne | 2.2 | 4.6 | 8.8 | 10.10 | 70 | North Melbourne won by 4 points | |||
melbourne (1st) v collingwood (2nd)
dees are clearly favourites for the 2nd ever 4 peat smashing pies by 45 the pies will have to beat the roos in a prelim to have a chance to protect their record of being the only 4 peater.
Second Semi-final
| Q1 | Q2 | Q3 | Q4 | Score | Date / Result | Ground | Crowd | ||
| Melbourne | 5.0 | 6.4 | 8.5 | 11.12 | 78 | Sat 6-Sep-1958 2:30 pm | M.C.G. | 77,350 | |
| Collingwood | 1.0 | 2.4 | 3.8 | 4.9 | 33 | Melbourne won by 45 points | |||
prelim final
collingwood v north