Semifinals
- Olympic Stadium -Qualification: First 3 in each heat (Q) and the next 2 fastest (q) advance to the Final
Results
| RankRk | Bib | Athlete | Mark | Qualification Mark | Record | Warning(s) | |
|---|---|---|---|---|---|---|---|
| 1 | 581 | 
WARHOLM K
| 46.06 | Q | + | ||
| 2 | 514 | 
CORSA D
| 46.20 | Q | + | ||
| 3 | 381 | 
CHALMERS C
| 46.32 | Q | + | ||
| 4 | 295 | 
ECHEVERRY DA
| 46.39 | q | PB | + | |
| 5 | 525 |
LEONARDI G
| 46.60 | + | |||
| 6 | 593 | 
KOWALUK D
| 46.74 | + | |||
| 7 | 553 | 
PACEVICIUS R
| 46.93 | PB | + | ||
| 8 | 630 | 
PARGE R
| 47.06 | YC | + |
- DNS
- Did Not Started
- DNF
- Did Not Finish
- DQ
- Disqualified
- Q
- Qualified by standard
- q
- Qualified by performance
- o
- Clearance
- x
- Failure
- NM
- No Mark
- Fn
- False Start
- WR
- World Record
- =WR
- Equal World Record
- ER
- European Record
- =ER
- Equal European Record
- CR
- Championship Record
- =CR
- Equal Championship Record
- EUR
- European U23 Record
- =EUR
- Equal European U23 Record
- WJR
- World Junior Record
- =WJR
- Equal World Junior Record
- EJR
- European Junior Record
- =EJR
- Equal European Junior Record
- WL
- World Lead
- =WL
- Equal World Lead
- EL
- European Lead
- =EL
- Equal European Lead
- WB
- World Best
- =WB
- Equal World Best
- EB
- European Best
- =EB
- Equal European Best
- CB
- Championship Best Performance
- =CB
- Equal Championship Best Performance
- NR
- National Record
- =NR
- Equal National Record
- NUR
- National U23 Record
- =NUR
- Equal National U23 Record
- NJR
- National Junior Record
- =NJR
- Equal National Junior Record
- PB
- Personal Best
- =PB
- Equal Personal Best
- SB
- Seasonal Best
- =SB
- Equal Seasonal Best
